Two servers cannot be configured at the same FQDN with different server version numbers. Cannot configure a server at FQDN ...

Two servers cannot be configured at the same FQDN with different server version numbers.

Cannot configure a server at FQDN [%1] because another server is already configured there with a different server version number. Existing server has role '%3' (version %4) with GUID %2. New server has role '%6' (version %7) with GUID %5.

ALL servers at this FQDN will be removed from the configuration until this conflict is resolved.

Cause: This is a configuration problem.
Resolution:
Review the server roles that are configured at this FQDN and ensure that they have identical version numbers.