The Active Directory Domain Controller could not replicate changes made to the partition %1. To avoid losing these changes, ...

The Active Directory Domain Controller could not replicate changes made to the partition %1.
 
 To avoid losing these changes, ensure that at least one Active Directory Domain Controller with this partition is available, and then try again.
 
 If you skip this step any changes made to this partition on this instance that have not yet replicated to other replicas will be lost.