COPY_TO_BYTES_FOUND_CWOBJ4910=CWOBJ4910E: Domain {0} is not going to send updates to domain {1} for {2}:{3} because the {4} map is configured as a byte array map in {5}.
Explanation
Map sets that contain byte array maps are not supported in a multi-primary environment.
User response
Remove byte array maps from the map set in order to enable primaires in both domains for this map set. No action is required if you do not want to support a multi-primary topology with this map set.