Change file reference says part is an assembly

This has happened a couple of times now so I wanted to see ifthere was a fix. When I try to change the file reference of a partdrawing, it shows the old part as a .sldprt file but shows thesymbol for an assembly. Then when I try to replace it with anotherpart, an error messages says "invalid operation: cannot change filetype (eg from part to assembly)"

Any thoughts?SolidworksDrawings And Detailing