The local domain controller cannot replicate with the following remote domain controller because of a mismatched replication ...

The local domain controller cannot replicate with the following remote domain controller because of a mismatched replication epoch (msDS-ReplicationEpoch). This typically occurs as part of the domain rename process. 
 
Remote domain controller: 
%1 
Remote domain controller replication epoch: 
%2 
Local domain controller replication epoch: 
%3 
 
Domain controllers undergoing a domain rename are not allowed to communicate with those domain controllers that have not yet undergone the domain rename. When all domain controllers have completed the domain rename, replication will once again be allowed.