The default federation route FQDN specifies an earlier release server. Cannot set the default federation route to server ...

The default federation route FQDN specifies an earlier release server.

Cannot set the default federation route to server [%1] because that server is an earlier release than this server. Users on this server will NOT be able to communicate with federation partners until that server is upgraded.
Cause: This is a configuration problem.
Resolution:
Upgrade the specified server, or change the default federation route to a more recent server.