This patch forces replicas to use DELETE+ADD operations to increment 'nsDS5ReplicaId' in 'cn=replication,cn=etc,$SUFFIX' on master, and retry multiple times in the case of conflict with another update. Thus when multiple replicas are set-up against single master none of them will have duplicate ID. https://fedorahosted.org/freeipa/ticket/4378 Reviewed-By: Thierry Bordaz <tbordaz@redhat.com>