Different Firmware on each side of my VESC, unable to flash, help needed

[Arzamenable]

Curiously, @DavidC has been in your shoes.

FSESC 6.6 DUAL repair - #8 by DavidC

Bricked 2 OG Focboxs Updating To FW4.1

You can SWD Prog it, but Focboxes do not have a SWD port. You would need to open the device, locate the port on the PCB, insert a JST connector or solder cables. Minute 5:34 onwards