We used to be able to pack and go an assembly into PDM and it would allow us to bring in files that are already there (hardware etc) but would flag them. Then after it's in PDM we could delete those "non-unique part number" flagged files.

Now it simply will not allow us to bring in the non-unique parts, and brings in the assembly broken, requiring us to manually re-establish the references to the hardware. 

What would be the potential cause of this? We are using SW 2019