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Help me please i dont know how to fix this

so im biluding marlin 2.0 help how do i fix this

> Executing task: C:\Users\Laptop\.platformio\penv\Scripts\platformio.exe run <

Processing mega2560 (platform: atmelavr; board: megaatmega2560; framework: arduino)
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/atmelavr/megaatmega2560.html
PLATFORM: Atmel AVR (2.2.0) > Arduino Mega or Mega 2560 ATmega2560 (Mega 2560)
HARDWARE: ATMEGA2560 16MHz, 8KB RAM, 248KB Flash
DEBUG: Current (simavr) On-board (simavr)
PACKAGES:
 - framework-arduino-avr 5.0.0
 - toolchain-atmelavr 1.50400.190710 (5.4.0)
Converting Marlin.ino
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 6 compatible libraries
Scanning dependencies...
Dependency Graph
|-- <TMCStepper> 0.7.1
|   |-- <SoftwareSerial> 1.0
|   |-- <SPI> 1.0
|-- <Wire> 1.0
|-- <SPI> 1.0
|-- <EEPROM> 2.0
|-- <SoftwareSerial> 1.0
Building in release mode
Compiling .pio\build\mega2560\src\src\HAL\AVR\HAL.cpp.o
Compiling .pio\build\mega2560\src\src\HAL\AVR\HAL_SPI.cpp.o
Compiling .pio\build\mega2560\src\src\HAL\AVR\MarlinSerial.cpp.o
Compiling .pio\build\mega2560\src\src\HAL\AVR\Servo.cpp.o
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfigPre.h:37:0,
Compiling .pio\build\mega2560\src\src\HAL\AVR\eeprom.cpp.o
                 from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\AVR\HAL_SPI.cpp:34:
Compiling .pio\build\mega2560\src\src\HAL\AVR\watchdog.cpp.o
Marlin\src\HAL\AVR\../../inc/../../Configuration.h:131:0: warning: "BOARD_BTT_SKR_MINI_E3_V1_2" redefined
Compiling .pio\build\mega2560\src\src\HAL\shared\HAL_spi_L6470.cpp.o
   #define BOARD_BTT_SKR_MINI_E3_V1_2
 ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfigPre.h:37:0,
                 from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:28,
Compiling .pio\build\mega2560\src\src\HAL\shared\eeprom_if_i2c.cpp.o
                 from Marlin\src\HAL\AVR\HAL.cpp:24:
Marlin\src\HAL\AVR\../../inc/../../Configuration.h:131:0: warning: "BOARD_BTT_SKR_MINI_E3_V1_2" redefined
   #define BOARD_BTT_SKR_MINI_E3_V1_2
 ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfigPre.h:35:0,
                 from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\AVR\HAL_SPI.cpp:34:
Marlin\src\HAL\AVR\../../inc/../core/boards.h:298:0: note: this is the location of the previous definition
 #define BOARD_BTT_SKR_MINI_E3_V1_2    4016  // BigTreeTech SKR Mini E3 V1.2 (STM32F103RC)
 ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfigPre.h:35:0,
                 from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\AVR\HAL.cpp:24:
Marlin\src\HAL\AVR\../../inc/../core/boards.h:298:0: note: this is the location of the previous definition
 #define BOARD_BTT_SKR_MINI_E3_V1_2    4016  // BigTreeTech SKR Mini E3 V1.2 (STM32F103RC)
 ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfigPre.h:37:0,
                 from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\AVR\MarlinSerial.cpp:39:
Marlin\src\HAL\AVR\../../inc/../../Configuration.h:131:0: warning: "BOARD_BTT_SKR_MINI_E3_V1_2" redefined
   #define BOARD_BTT_SKR_MINI_E3_V1_2
 ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfigPre.h:35:0,
                 from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\AVR\MarlinSerial.cpp:39:
Marlin\src\HAL\AVR\../../inc/../core/boards.h:298:0: note: this is the location of the previous definition
 #define BOARD_BTT_SKR_MINI_E3_V1_2    4016  // BigTreeTech SKR Mini E3 V1.2 (STM32F103RC)
 ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfigPre.h:37:0,
                 from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\AVR\Servo.cpp:56:
Marlin\src\HAL\AVR\../../inc/../../Configuration.h:131:0: warning: "BOARD_BTT_SKR_MINI_E3_V1_2" redefined
   #define BOARD_BTT_SKR_MINI_E3_V1_2
 ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfigPre.h:35:0,
                 from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\AVR\Servo.cpp:56:
Marlin\src\HAL\AVR\../../inc/../core/boards.h:298:0: note: this is the location of the previous definition
 #define BOARD_BTT_SKR_MINI_E3_V1_2    4016  // BigTreeTech SKR Mini E3 V1.2 (STM32F103RC)
 ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfigPre.h:37:0,
                 from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\AVR\eeprom.cpp:24:
Marlin\src\HAL\AVR\../../inc/../../Configuration.h:131:0: warning: "BOARD_BTT_SKR_MINI_E3_V1_2" redefined
   #define BOARD_BTT_SKR_MINI_E3_V1_2
 ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfigPre.h:35:0,
                 from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\AVR\eeprom.cpp:24:
Marlin\src\HAL\AVR\../../inc/../core/boards.h:298:0: note: this is the location of the previous definition
 #define BOARD_BTT_SKR_MINI_E3_V1_2    4016  // BigTreeTech SKR Mini E3 V1.2 (STM32F103RC)
 ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfigPre.h:37:0,
                 from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\AVR\watchdog.cpp:24:
Marlin\src\HAL\AVR\../../inc/../../Configuration.h:131:0: warning: "BOARD_BTT_SKR_MINI_E3_V1_2" redefined
   #define BOARD_BTT_SKR_MINI_E3_V1_2
 ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfigPre.h:35:0,
                 from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\AVR\watchdog.cpp:24:
Marlin\src\HAL\AVR\../../inc/../core/boards.h:298:0: note: this is the location of the previous definition
 #define BOARD_BTT_SKR_MINI_E3_V1_2    4016  // BigTreeTech SKR Mini E3 V1.2 (STM32F103RC)
 ^
In file included from Marlin\src\HAL\shared\../../inc/MarlinConfigPre.h:37:0,
                 from Marlin\src\HAL\shared\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\shared\HAL_spi_L6470.cpp:28:
Marlin\src\HAL\shared\../../inc/../../Configuration.h:131:0: warning: "BOARD_BTT_SKR_MINI_E3_V1_2" redefined
   #define BOARD_BTT_SKR_MINI_E3_V1_2
 ^
In file included from Marlin\src\HAL\shared\../../inc/MarlinConfigPre.h:35:0,
                 from Marlin\src\HAL\shared\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\shared\HAL_spi_L6470.cpp:28:
Marlin\src\HAL\shared\../../inc/../core/boards.h:298:0: note: this is the location of the previous definition
 #define BOARD_BTT_SKR_MINI_E3_V1_2    4016  // BigTreeTech SKR Mini E3 V1.2 (STM32F103RC)
 ^
In file included from Marlin\src\HAL\shared\../../inc/MarlinConfigPre.h:37:0,
                 from Marlin\src\HAL\shared\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\shared\eeprom_if_i2c.cpp:28:
Marlin\src\HAL\shared\../../inc/../../Configuration.h:131:0: warning: "BOARD_BTT_SKR_MINI_E3_V1_2" redefined
   #define BOARD_BTT_SKR_MINI_E3_V1_2
 ^
In file included from Marlin\src\HAL\shared\../../inc/MarlinConfigPre.h:35:0,
                 from Marlin\src\HAL\shared\../../inc/MarlinConfig.h:28,
                 from Marlin\src\HAL\shared\eeprom_if_i2c.cpp:28:
Marlin\src\HAL\shared\../../inc/../core/boards.h:298:0: note: this is the location of the previous definition
 #define BOARD_BTT_SKR_MINI_E3_V1_2    4016  // BigTreeTech SKR Mini E3 V1.2 (STM32F103RC)
 ^
Marlin\src\HAL\AVR\../../inc/../core/boards.h:383:64: error: operator '==' has no right operand
 #define _MB_1(B)  (defined(BOARD_##B) && MOTHERBOARD==BOARD_##B)
                                                                ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:159:29: note: in expansion of macro '_MB_1'
 #define _DO_1(W,C,A)       (_##W##_1(A))
                             ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:171:28: note: in expansion of macro '_DO_1'
 #define __DO_N(W,C,N,V...) _DO_##N(W,C,V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:172:28: note: in expansion of macro '__DO_N'
 #define _DO_N(W,C,N,V...)  __DO_N(W,C,N,V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:173:28: note: in expansion of macro '_DO_N'
 #define DO(W,C,V...)       _DO_N(W,C,NUM_ARGS(V),V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/boards.h:384:19: note: in expansion of macro 'DO'
 #define MB(V...)  DO(MB,||,V)
                   ^
Marlin\src\HAL\AVR\../../inc/../pins/pins.h:521:7: note: in expansion of macro 'MB'
 #elif MB(BTT_SKR_MINI_E3_V1_2)
       ^
Marlin\src\HAL\AVR\../../inc/../core/boards.h:383:64: error: operator '==' has no right operand
 #define _MB_1(B)  (defined(BOARD_##B) && MOTHERBOARD==BOARD_##B)
                                                                ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:159:29: note: in expansion of macro '_MB_1'
 #define _DO_1(W,C,A)       (_##W##_1(A))
                             ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:171:28: note: in expansion of macro '_DO_1'
 #define __DO_N(W,C,N,V...) _DO_##N(W,C,V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:172:28: note: in expansion of macro '__DO_N'
 #define _DO_N(W,C,N,V...)  __DO_N(W,C,N,V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:173:28: note: in expansion of macro '_DO_N'
 #define DO(W,C,V...)       _DO_N(W,C,NUM_ARGS(V),V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/boards.h:384:19: note: in expansion of macro 'DO'
 #define MB(V...)  DO(MB,||,V)
                   ^
Marlin\src\HAL\AVR\../../inc/../pins/pins.h:521:7: note: in expansion of macro 'MB'
 #elif MB(BTT_SKR_MINI_E3_V1_2)
       ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:32:0,
                 from Marlin\src\HAL\AVR\HAL_SPI.cpp:34:
Marlin\src\HAL\AVR\../../inc/../pins/pins.h:724:6: error: #error "Unknown MOTHERBOARD value set in Configuration.h"
     #error "Unknown MOTHERBOARD value set in Configuration.h"
      ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:32:0,
                 from Marlin\src\HAL\AVR\HAL.cpp:24:
Marlin\src\HAL\AVR\../../inc/../pins/pins.h:724:6: error: #error "Unknown MOTHERBOARD value set in Configuration.h"
     #error "Unknown MOTHERBOARD value set in Configuration.h"
      ^
Marlin\src\HAL\AVR\../../inc/../core/boards.h:383:64: error: operator '==' has no right operand
 #define _MB_1(B)  (defined(BOARD_##B) && MOTHERBOARD==BOARD_##B)
                                                                ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:159:29: note: in expansion of macro '_MB_1'
 #define _DO_1(W,C,A)       (_##W##_1(A))
                             ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:171:28: note: in expansion of macro '_DO_1'
 #define __DO_N(W,C,N,V...) _DO_##N(W,C,V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:172:28: note: in expansion of macro '__DO_N'
 #define _DO_N(W,C,N,V...)  __DO_N(W,C,N,V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:173:28: note: in expansion of macro '_DO_N'
 #define DO(W,C,V...)       _DO_N(W,C,NUM_ARGS(V),V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/boards.h:384:19: note: in expansion of macro 'DO'
 #define MB(V...)  DO(MB,||,V)
                   ^
Marlin\src\HAL\AVR\../../inc/../pins/pins.h:521:7: note: in expansion of macro 'MB'
 #elif MB(BTT_SKR_MINI_E3_V1_2)
       ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:32:0,
                 from Marlin\src\HAL\AVR\MarlinSerial.cpp:39:
Marlin\src\HAL\AVR\../../inc/../pins/pins.h:724:6: error: #error "Unknown MOTHERBOARD value set in Configuration.h"
     #error "Unknown MOTHERBOARD value set in Configuration.h"
      ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\AVR\HAL.cpp:24:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:82:4: error: #error "MOTHERBOARD is required. Please update your configuration."
   #error "MOTHERBOARD is required. Please update your configuration."
    ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\AVR\HAL_SPI.cpp:34:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:82:4: error: #error "MOTHERBOARD is required. Please update your configuration."
   #error "MOTHERBOARD is required. Please update your configuration."
    ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\AVR\MarlinSerial.cpp:39:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:82:4: error: #error "MOTHERBOARD is required. Please update your configuration."
   #error "MOTHERBOARD is required. Please update your configuration."
    ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\AVR\HAL.cpp:24:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1240:8: error: #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
       #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
        ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\AVR\HAL_SPI.cpp:34:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1240:8: error: #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
       #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
        ^
Marlin\src\HAL\AVR\../../inc/../core/boards.h:383:64: error: operator '==' has no right operand
 #define _MB_1(B)  (defined(BOARD_##B) && MOTHERBOARD==BOARD_##B)
                                                                ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:159:29: note: in expansion of macro '_MB_1'
 #define _DO_1(W,C,A)       (_##W##_1(A))
                             ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:171:28: note: in expansion of macro '_DO_1'
 #define __DO_N(W,C,N,V...) _DO_##N(W,C,V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:172:28: note: in expansion of macro '__DO_N'
 #define _DO_N(W,C,N,V...)  __DO_N(W,C,N,V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:173:28: note: in expansion of macro '_DO_N'
 #define DO(W,C,V...)       _DO_N(W,C,NUM_ARGS(V),V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/boards.h:384:19: note: in expansion of macro 'DO'
 #define MB(V...)  DO(MB,||,V)
                   ^
Marlin\src\HAL\AVR\../../inc/../pins/pins.h:521:7: note: in expansion of macro 'MB'
 #elif MB(BTT_SKR_MINI_E3_V1_2)
       ^
Marlin\src\HAL\AVR\../../inc/../core/boards.h:383:64: error: operator '==' has no right operand
 #define _MB_1(B)  (defined(BOARD_##B) && MOTHERBOARD==BOARD_##B)
                                                                ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:159:29: note: in expansion of macro '_MB_1'
 #define _DO_1(W,C,A)       (_##W##_1(A))
                             ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:171:28: note: in expansion of macro '_DO_1'
 #define __DO_N(W,C,N,V...) _DO_##N(W,C,V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:172:28: note: in expansion of macro '__DO_N'
 #define _DO_N(W,C,N,V...)  __DO_N(W,C,N,V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:173:28: note: in expansion of macro '_DO_N'
 #define DO(W,C,V...)       _DO_N(W,C,NUM_ARGS(V),V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/boards.h:384:19: note: in expansion of macro 'DO'
 #define MB(V...)  DO(MB,||,V)
                   ^
Marlin\src\HAL\AVR\../../inc/../pins/pins.h:521:7: note: in expansion of macro 'MB'
 #elif MB(BTT_SKR_MINI_E3_V1_2)
       ^
Marlin\src\HAL\shared\../../inc/../core/boards.h:383:64: error: operator '==' has no right operand
 #define _MB_1(B)  (defined(BOARD_##B) && MOTHERBOARD==BOARD_##B)
                                                                ^
Marlin\src\HAL\shared\../../inc/../core/macros.h:159:29: note: in expansion of macro '_MB_1'
 #define _DO_1(W,C,A)       (_##W##_1(A))
                             ^
Marlin\src\HAL\shared\../../inc/../core/macros.h:171:28: note: in expansion of macro '_DO_1'
 #define __DO_N(W,C,N,V...) _DO_##N(W,C,V)
                            ^
Marlin\src\HAL\shared\../../inc/../core/macros.h:172:28: note: in expansion of macro '__DO_N'
 #define _DO_N(W,C,N,V...)  __DO_N(W,C,N,V)
                            ^
Marlin\src\HAL\shared\../../inc/../core/macros.h:173:28: note: in expansion of macro '_DO_N'
 #define DO(W,C,V...)       _DO_N(W,C,NUM_ARGS(V),V)
                            ^
Marlin\src\HAL\shared\../../inc/../core/boards.h:384:19: note: in expansion of macro 'DO'
 #define MB(V...)  DO(MB,||,V)
                   ^
Marlin\src\HAL\shared\../../inc/../pins/pins.h:521:7: note: in expansion of macro 'MB'
 #elif MB(BTT_SKR_MINI_E3_V1_2)
       ^
Marlin\src\HAL\AVR\../../inc/../core/boards.h:383:64: error: operator '==' has no right operand
 #define _MB_1(B)  (defined(BOARD_##B) && MOTHERBOARD==BOARD_##B)
                                                                ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:159:29: note: in expansion of macro '_MB_1'
 #define _DO_1(W,C,A)       (_##W##_1(A))
                             ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:171:28: note: in expansion of macro '_DO_1'
 #define __DO_N(W,C,N,V...) _DO_##N(W,C,V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:172:28: note: in expansion of macro '__DO_N'
 #define _DO_N(W,C,N,V...)  __DO_N(W,C,N,V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/macros.h:173:28: note: in expansion of macro '_DO_N'
 #define DO(W,C,V...)       _DO_N(W,C,NUM_ARGS(V),V)
                            ^
Marlin\src\HAL\AVR\../../inc/../core/boards.h:384:19: note: in expansion of macro 'DO'
 #define MB(V...)  DO(MB,||,V)
                   ^
Marlin\src\HAL\AVR\../../inc/../pins/pins.h:521:7: note: in expansion of macro 'MB'
 #elif MB(BTT_SKR_MINI_E3_V1_2)
       ^
Marlin\src\HAL\shared\../../inc/../core/boards.h:383:64: error: operator '==' has no right operand
 #define _MB_1(B)  (defined(BOARD_##B) && MOTHERBOARD==BOARD_##B)
                                                                ^
Marlin\src\HAL\shared\../../inc/../core/macros.h:159:29: note: in expansion of macro '_MB_1'
 #define _DO_1(W,C,A)       (_##W##_1(A))
                             ^
Marlin\src\HAL\shared\../../inc/../core/macros.h:171:28: note: in expansion of macro '_DO_1'
 #define __DO_N(W,C,N,V...) _DO_##N(W,C,V)
                            ^
Marlin\src\HAL\shared\../../inc/../core/macros.h:172:28: note: in expansion of macro '__DO_N'
 #define _DO_N(W,C,N,V...)  __DO_N(W,C,N,V)
                            ^
Marlin\src\HAL\shared\../../inc/../core/macros.h:173:28: note: in expansion of macro '_DO_N'
 #define DO(W,C,V...)       _DO_N(W,C,NUM_ARGS(V),V)
                            ^
Marlin\src\HAL\shared\../../inc/../core/boards.h:384:19: note: in expansion of macro 'DO'
 #define MB(V...)  DO(MB,||,V)
                   ^
Marlin\src\HAL\shared\../../inc/../pins/pins.h:521:7: note: in expansion of macro 'MB'
 #elif MB(BTT_SKR_MINI_E3_V1_2)
       ^
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1298:8: error: #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
       #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
        ^
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1298:8: error: #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
       #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
        ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:32:0,
                 from Marlin\src\HAL\AVR\eeprom.cpp:24:
Marlin\src\HAL\AVR\../../inc/../pins/pins.h:724:6: error: #error "Unknown MOTHERBOARD value set in Configuration.h"
     #error "Unknown MOTHERBOARD value set in Configuration.h"
      ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:32:0,
                 from Marlin\src\HAL\AVR\Servo.cpp:56:
Marlin\src\HAL\AVR\../../inc/../pins/pins.h:724:6: error: #error "Unknown MOTHERBOARD value set in Configuration.h"
     #error "Unknown MOTHERBOARD value set in Configuration.h"
      ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\AVR\MarlinSerial.cpp:39:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1240:8: error: #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
       #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
        ^
compilation terminated due to -fmax-errors=5.
compilation terminated due to -fmax-errors=5.
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1298:8: error: #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
       #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
        ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:32:0,
                 from Marlin\src\HAL\AVR\watchdog.cpp:24:
Marlin\src\HAL\AVR\../../inc/../pins/pins.h:724:6: error: #error "Unknown MOTHERBOARD value set in Configuration.h"
     #error "Unknown MOTHERBOARD value set in Configuration.h"
      ^
In file included from Marlin\src\HAL\shared\../../inc/MarlinConfig.h:32:0,
                 from Marlin\src\HAL\shared\eeprom_if_i2c.cpp:28:
Marlin\src\HAL\shared\../../inc/../pins/pins.h:724:6: error: #error "Unknown MOTHERBOARD value set in Configuration.h"
     #error "Unknown MOTHERBOARD value set in Configuration.h"
      ^
In file included from Marlin\src\HAL\shared\../../inc/MarlinConfig.h:32:0,
                 from Marlin\src\HAL\shared\HAL_spi_L6470.cpp:28:
Marlin\src\HAL\shared\../../inc/../pins/pins.h:724:6: error: #error "Unknown MOTHERBOARD value set in Configuration.h"
     #error "Unknown MOTHERBOARD value set in Configuration.h"
      ^
*** [.pio\build\mega2560\src\src\HAL\AVR\HAL.cpp.o] Error 1
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\AVR\eeprom.cpp:24:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:82:4: error: #error "MOTHERBOARD is required. Please update your configuration."
   #error "MOTHERBOARD is required. Please update your configuration."
    ^
*** [.pio\build\mega2560\src\src\HAL\AVR\HAL_SPI.cpp.o] Error 1
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\AVR\Servo.cpp:56:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:82:4: error: #error "MOTHERBOARD is required. Please update your configuration."
   #error "MOTHERBOARD is required. Please update your configuration."
    ^
compilation terminated due to -fmax-errors=5.
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\AVR\eeprom.cpp:24:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1240:8: error: #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
       #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
        ^
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1298:8: error: #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
       #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
        ^
compilation terminated due to -fmax-errors=5.
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\AVR\Servo.cpp:56:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1240:8: error: #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
       #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
        ^
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1298:8: error: #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
       #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
        ^
compilation terminated due to -fmax-errors=5.
*** [.pio\build\mega2560\src\src\HAL\AVR\MarlinSerial.cpp.o] Error 1
*** [.pio\build\mega2560\src\src\HAL\AVR\Servo.cpp.o] Error 1
*** [.pio\build\mega2560\src\src\HAL\AVR\eeprom.cpp.o] Error 1
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\AVR\watchdog.cpp:24:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:82:4: error: #error "MOTHERBOARD is required. Please update your configuration."
   #error "MOTHERBOARD is required. Please update your configuration."
    ^
In file included from Marlin\src\HAL\shared\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\shared\eeprom_if_i2c.cpp:28:
Marlin\src\HAL\shared\../../inc/SanityCheck.h:82:4: error: #error "MOTHERBOARD is required. Please update your configuration."
   #error "MOTHERBOARD is required. Please update your configuration."
    ^
In file included from Marlin\src\HAL\shared\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\shared\HAL_spi_L6470.cpp:28:
Marlin\src\HAL\shared\../../inc/SanityCheck.h:82:4: error: #error "MOTHERBOARD is required. Please update your configuration."
   #error "MOTHERBOARD is required. Please update your configuration."
    ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\AVR\watchdog.cpp:24:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1240:8: error: #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
       #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
        ^
In file included from Marlin\src\HAL\shared\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\shared\eeprom_if_i2c.cpp:28:
Marlin\src\HAL\shared\../../inc/SanityCheck.h:1240:8: error: #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
       #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
        ^
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1298:8: error: #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
       #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
        ^
Marlin\src\HAL\shared\../../inc/SanityCheck.h:1298:8: error: #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
       #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
        ^
compilation terminated due to -fmax-errors=5.
compilation terminated due to -fmax-errors=5.
In file included from Marlin\src\HAL\shared\../../inc/MarlinConfig.h:41:0,
                 from Marlin\src\HAL\shared\HAL_spi_L6470.cpp:28:
Marlin\src\HAL\shared\../../inc/SanityCheck.h:1240:8: error: #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
       #error "SERVO0_PIN must be defined for your servo or BLTOUCH probe."
        ^
Marlin\src\HAL\shared\../../inc/SanityCheck.h:1298:8: error: #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
       #error "Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN requires the Z_MIN_PIN to be defined."
        ^
compilation terminated due to -fmax-errors=5.
*** [.pio\build\mega2560\src\src\HAL\AVR\watchdog.cpp.o] Error 1
*** [.pio\build\mega2560\src\src\HAL\shared\HAL_spi_L6470.cpp.o] Error 1
*** [.pio\build\mega2560\src\src\HAL\shared\eeprom_if_i2c.cpp.o] Error 1
================================================================================================== [FAILED] Took 6.44 seconds ================================================================================================== 

Environment    Status    Duration
-------------  --------  ------------
mega2560       FAILED    00:00:06.438
============================================================================================= 1 failed, 0 succeeded in 00:00:06.438 =============================================================================================
The terminal process "C:\Users\Laptop\.platformio\penv\Scripts\platformio.exe 'run'" terminated with exit code: 1.

Terminal will be reused by tasks, press any key to close it.

Hi Bret,

the preprocessor throws many redefinition warnings. This happens if you have used more than one #define directive with the exact same NAME in your solution, e.g. #define MY_SPECIAL_CONSTANT 42 in main.cpp and somewhere else in e.g. lib/allMyConsts.h you have something like #define MY_SPECIAL_CONSTANT 43. This error even comes up when your redefined value is the same.

Please clean your solution by searching duplicates from your warning list and eliminating them. Also consider lib or other dependencies you pulled into the project (scan platformio.ini). This will at least unclutter the error output and help you to see more clearly.