Migrating an old design to Central catalog? Finding duplicate datatables

When i set up my old design to call the central catalog i get a bunch of errors wanting to rename datatables.  I would rather them use the datatables from the central catalog.   How can this be avoided?   Ive updated the datatables manually in the design to what i put in the central catalog but i still see that it's throwing an error as a duplicate.  I would like a streamlined import.   are there other toggles i can do to streamline the datatables.

If we are forced to rename them can PTC give us a way to rename them all quickly with a formula (similar to renaming in a Creo assy)