Error remove write protect from card - remove write protection nVidia P104 - ROM Flashing failed

I upgraded a lot of cards, same type, same configuration. Now, one rig is geting me this error
What i miss?

I even tried flashing using its own backup file, and failed also …

Tried now to flash again another gpu’s from another rigs, including those who was successfully flashed in the past in the same way. All of them are getting the same error now, the flashing process is not working anymore.