Merge Replication - Delete Operation Failure on Subsciber reported as "This failure can be caused by a constraint violation. Unable to synchronize the row because the row was updated by a different process outside of replication."

Hi all,

The merge replication on the table in question works fine for Updates and Inserts which I can see in replication monitor but when deletes occur I get this error when merge replication tries to delete the row on the subscriber.

Please note that below is a screenshot showing that referenced objects for deletions are correct and I have verified that the objects are present etc , all of that look Ok.

I tracked through the objects and tried to manually recall replication to deleted the row on the subscriber with the call

[dbo].[MSmerge_del_sp_F76ED4C8192B4AA26845A21483954514]1,null,'820f2006-1529-e511-9403-40f2e9249f9a'

and that went through with no error and it looks like replication is no longer retrying to run the delete and subsequently causing another conflict to tick for this row.

My question is, having a look at the tombstone records below (Publisher is first and then the Subscriber) given that the generation and lineage are different, is this the cause?

Like I said Inserts and Updates go through to the subscriber with No issue and work fine, its just when delete operations get called it seems that this error gets raised.

Any advice appreciated.

Kind regards,

Matt