GENIUS! Thank you @darcilicious! That worked like a charm.
So to be sure, what worked for me is:
- Cut photos out from directory, move them to root.
- Library →
Scan Library Files - Cut photos from root back into original directory.
- Library →
Scan Library Files
You can mark this as the answer as far as I am concerned. I can also remove this page from my “nag” browser/url list.
Thanks again @darcilicious!