I don't normally build a new part referencing an existing part in an assembly, but it seemed like the right thing to do in this case. It was a sheet metal door that will be hinged onto a sheet metal box. Anyway, after designing the door and locating door pivots on the box and the door, I decided I wanted to make the door swing open and close on the box. So the first thing I did was delete the in-place mate of the door. Even though there were warnings about deleting the in-place mate, I did it anyway. Now my door part has major rebuild problems. It seems the sketches are missing important references.
Any suggestions on how I can fix the model of the door now?