MNT keyboard standalone

Hello guys, I try to flash the keyboard but I get this error when using the script:

Erasing flash...  Success
Checking memory from 0x0 to 0x6FFF...  Not blank at 0x1.
Checking memory from 0x0 to 0x3A7F...  Not blank at 0x1.
The target memory for the program is not blank.
Use --force flag to override this error check.

After the script runs the keyboard returns to normal mode. I am on a macbook pro m1 machine but also tried it on my lenovo which runs linux and I got the same error. I also added the --force flag but nothing changed.