I rencently ran into this situation (in fact I have seen this twice):
A customer has a Callmanager server whose IP address has been changed. Since that change, there is a new entry in the Servers list in Callmanager Administration, that has the new IP address for the server, and has all the services of the server under it.
There also remains an entry for the Publisher with the old IP, and it has no services under it.
When I attemped to delete it, i got the message "The Publisher node cannot be deleted"
Has anyone ever experienced it, and has a procedure to fix it?