I just thought I'd share this
Today my sim hired pianist and it turned out to be a ghost undefined
Forum Discussion
Once i had so many ghost hidden households that all npc jobs were filled by ghosts. It was cool until it got overwhelming. Here's how i fixed it, if it comes to that for you:
https://forums.thesims.com/en_US/discussion/974769/how-can-i-evict-ghosts-solved#latest
https://forums.thesims.com/en_US/discussion/974769/how-can-i-evict-ghosts-solved#latest
