As I said, we will need to wait for a generation of Egyptologists not so eager to attribute everything to whoever was last to scratch his name onto it.
The technical term for someone carving their name on something someone else had built is "usurpation" and it's hardly an obscure topic in Egyptology. It is definitely something people think of when dating objects and monuments.
https://escholarship.org/content/qt5gj996k5/qt5gj996k5.pdf