Looking at my past auto saves, it looks like a dupe died and then the dupe was resurrected and I gained a dupe of the dupe. Not sure if the one that died was the one that got duped. The stats on the cloned dupe are random but has +10 to excavation
Steps to Reproduce
Not sure, I noticed one of my dupes being really slow and then noticed she was really new.
This issue has not been confirmed by a developer yet.