Fortigate HA out of sync after upgrading to version 7.4.9

@Kyra_98  

run below command on both firewalls 

#diag sys ha checksum recalculate

If still showing not synced , get below output and attach to here on both firewall 

get sys status 

show sys central-management

show firewall internet-service-name

Follow this KB how to access the secondary from primary to run the commands 

https://community.fortinet.com/t5/FortiGate/Technical-Tip-How-to-access-the-secondary-unit-from-the-primary/ta-p/196091

Additionally to Derek's advice, I usually get it solved quickly just by rebooting the passive node. This usually works.

@yderek @AEK 

Thanks for your responses.

I ran the command:
#diag sys ha checksum recalculate

And the secondary firewall was also restarted, but it still won't sync with HA.

I'm sharing the output from the commands provided.

FG_PRIMARY 

FG_SECONDARY 

@Kyra_98  Can you login to secondary device and try to added the below part manually first 

config sys central-management 

set vdom 'vsys_hamgmt'

end 

set vdom 'vsys_hamgmt' --this is the command that is missing from the secondary for the central management part 

This is bit strange as vsys_hamgmt will be the hidden vdom system created for your device automaticlly once you have a dedicated management interface enabled for OOB 

Let's see whether above will fix the first table, we come back to your ISDB name mismatch will be require bit troubleshooting