[Help] Strange issue with Replication

I have discovered 20 of my items (out of thousands) seem to have a replication target which points to the same source item not a different item, that is pointing to itself. I wonder how I can fix this?

There’s no “replication target”, a replicant and its “original” are the same item. And therefore there’s actually no such thing like an original.

Well the location of the replicant is exactly the same as the item.
Therefore there is no replicant and there should be zero.
However, for 20 items each has one replicant recorded where there should be none.

According to the screenshot one replicants exists in Stuff To Sort, one in the subgroup YouTube.