Error using chip erase about pymcuprog HOT 1 OPEN

Hi @strawberryhacker
Yes, this is a bit of a tricky one for pymcuprog... the catch here is that Studio actually automatically and secretly resets the fuse value after an erase (fuses are untouched through an erase), and we did not want to build in this knowledge to pymcuprog.
A possible workaround is to write the corrected fuse value using pymcuprog, and use the chip-erase-locked-device switch to get in. This will perform a UPDI-key-based erase, and immediately write the fuse.
for example on my tiny1627:
pymcuprog write -m fuses -o 5 -l 0xC7 --chip-erase-locked-device
will do this.

from pymcuprog.