A bug, library upload with wrench.
I have an upload that has a wrench in it like it has custom content, but, I don’t use mods or custom content.
Forum Discussion
I had this happen to me the other day too. I do have mods and CC, but I hadn't used any in the build. Pulling my mods folder and clearing the cache didn't help either. Turns out it was some photos my sim had taken that I used to decorated with. When I removed them, the wrench was gone.
