Synchronization failed - No license

[marke]

Both our SmartCenter servers have Enterprise SmartCenter licenses plus the primary SmartCenter has an evaluation HA license.

When attempting synchronization it fails with error - No license (on standby).
If I remove the Enterprise license from the secondary SmartCenter and use an evaluation SmartCenter license it still fails with the same error.

However if I remove all licenses from the secondary SmartCenter and as the SmartCenter is recently installed, use the 15 day trial license then it works.

I have confirmed with our provider that it should work with the licenses that we have.