Flash cell module again

Hey, 2 of my self soldered cell modules don’t work properly. In the process of finding out whats wrong i tried to flash them again with platformio. This doesn’t work. Then i found out that it doesnt work with my working modules too:
Whats the trick to flash a module again - maybe if you want to update?

avrdude: try to set SCK period to 1.6e-05 s (= 62500 Hz)
avrdude: set SCK frequency to 32000 Hz
avrdude: warning: cannot set sck period. please check for usbasp firmware update.
avrdude: error: program enable: target doesn't answer. 1 
avrdude: initialization failed, rc=-1
         Double check connections and try again, or use -F to override
         this check.

avrdude done.  Thank you.

*** [upload] Error 1
================================================= [FAILED] Took 0.89 seconds =================================================

Environment     Status    Duration
--------------  --------  ------------
attiny841_V400  FAILED    00:00:00.892
=========================================== 1 failed, 0 succeeded in 00:00:00.892 ===========================================
The terminal process "platformio 'run', '--target', 'upload', '--environment', 'attiny841_V400'" terminated with exit code: 1.

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Hello, there isn’t a trick - its the same process you used the first time. Make sure the module is disconnected from the cell/battery first, connect the USBASP programmer to your computer, connect that to the module (using the 6 pin header) and then program!