STM32G4 flash download error "write into gap from 0x08010000 to 0x0803ffff"

fail to download code to STM32G474CBT6 flash. yet download code to G474RE successfully.
Error: write into gap from 0x08010000 to 0x0803ffff


Building in release mode
Checking size .pio\build\genericSTM32G474CB\firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM:   [===       ]  28.5% (used 37316 bytes from 131072 bytes)
Flash: [=====     ]  54.7% (used 71636 bytes from 131072 bytes)
Configuring upload protocol...
AVAILABLE: blackmagic, cmsis-dap, jlink, mbed, stlink
CURRENT: upload_protocol = stlink
Uploading .pio\build\genericSTM32G474CB\firmware.elf
xPack Open On-Chip Debugger 0.12.0-01004-g9ea7f3d64-dirty (2023-01-30-15:04)
Licensed under GNU GPL v2
For bug reports, read
debug_level: 1

[stm32g4x.cpu] halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x080002b0 msp: 0x2000d278
** Programming Started **
Warn : Adding extra erase range, 0x080119c8 .. 0x080407ff
Error: write into gap from 0x08010000 to 0x0803ffff
Error: error writing to flash at address 0x08000000 at offset 0x00000000
embedded:startup.tcl:1516: Error: ** Programming Failed **
in procedure 'program' 
in procedure 'program_error' called at file "embedded:startup.tcl", line 1581
at file "embedded:startup.tcl", line 1516
*** [upload] Error 1

here I use STM32G474CBT6 with my own enviroment: env:genericSTM32G474CB.
I add my own board named “genericSTM32G474CB.json” at C:\Users\xxx.platformio\platforms\ststm32\boards

  "build": {
    "core": "stm32",
    "cpu": "cortex-m4",
    "extra_flags": "-DSTM32G4xx -DSTM32G474xx",
    "f_cpu": "170000000L",
    "mcu": "stm32g474cbt6",
    "product_line": "STM32G474xx",
    "variant": "STM32G4xx/G473R(B-C-E)T_G474R(B-C-E)T_G483RET_G484RET"
  "connectivity": [
  "debug": {
    "default_tools": [
    "jlink_device": "STM32G474CB",
    "onboard_tools": [
    "openocd_target": "stm32g4x",
    "svd_path": "STM32G474xx.svd"
  "frameworks": [
  "name": "genericSTM32G474CB",
  "upload": {
    "maximum_ram_size": 131072,
    "maximum_size": 131072,
    "protocol": "stlink",
    "protocols": [
  "url": "",
  "vendor": "ST"

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