Fast Failure Unknown Board ID

Here is my error:

Executing task: C:\Users\Susan.platformio\penv\Scripts\platformio.exe run --environment STM32G0B1RE_btt <

Processing STM32G0B1RE_btt (platform: ststm32@~14.1.0; board: marlin_STM32G0B1RE; framework: arduino)

Error: Unknown board ID ‘marlin_STM32G0B1RE’
The terminal process “C:\Users\Susan.platformio\penv\Scripts\platformio.exe ‘run’, ‘–environment’, ‘STM32G0B1RE_btt’” terminated with exit code: 1.

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

Incomplete Marlin download? Where did you download Marlin from? Have you tried redownloading it cleanly?

Thanks, i think that cleared it and fixed the issue.