I'm having a strange issue in one of my saves. A lot of NPCs are no longer wearing the correct uniforms, instead it seems their everyday outfits are being copied over it instead. This is also affecting special outfits, like the bee keeping suit.

The problem seems to be spreading, since now my Sims have suddenly lost their outerwear outfits. One sim has random clothing, the other has a copy of their everyday outfit. They also now go to work in their everyday outfits instead of the correct uniform.

I haven't got any mods that should affect clothing, and I haven't changed anything in between things working normally and the issue occurring. Does anyone have any idea what it could be, or how I can reset the work uniforms to what they are meant to be?