XGFirewall Update HA Firmware Error

Hi everyone,

I have two XG135 Firewall equipment. They were HA configured and firmware SFOS15.5. To carry out the firmware update process, I removed the HA as requested in the update screen, but after performing equipment 2 it was no longer recognizable. I performed the update of equipment 1 to firmware SFOS 17.5 and then to SFOS 18.0. I'm trying to access appliance 2 through the HA configuration but it is not recognized. What would be the process to restore equipment 2?