Pixhawk CubeOrange not booting after adding firmware tamper proof

I programmed a firmware tamper proof in the pixhawk CubeOrange as discussed in ardupilot/Tools/scripts/signing at master · ArduPilot/ardupilot · GitHub.
For testing the firmware tamper, I uploaded an unsigned firmware and now the pixhawk isn’t booting.
I have no idea what to do now. A kind help would be really appreciated.