Azure APIM Instance - Failed to update API management service hostnames

I am trying to update APIM custom domains with new certificates from the KeyVault. But it fails with the message "Failed to update API management service hostnames" with some CorrelationID.

I tried to delete the domain from the custom domain list, still the same here. Has anyone faced similar issue? Any leads will be helpful.

I fixed the issue.

So basically, I had two custom domains for which the certificates were expired. I was trying to update one of them with new certificate. But it failed all the time.

So the solution is delete all the custom domains that have expired certificates, save them and add the domains again with new certificates.