Here 3 parameters missing after activate passThrough

Hi, I was trying to update the u-blox chip from Here 3 following the Here 3 manual (https://docs.cubepilot.org/user-guides/here-3/here-3-manual) point 2 "Firmware update of the HERE3 u-blox chip ".

After writing and setting the “passThrough” parameter to 2 and rebooting, I can no longer see the parameters to restore “passThrough” to 0 and return the GPS to its normal state.
Also, you cannot connect to u-center to update firmware.

Thanks in advance for your help.

Are you able to update your Here3 itself (not the u-blox chip)? In this way you can reflash the firmware on your Here3.