Okay, I thought this issue was fixed, but now it's back again?! When this was an issue a while back, they said they fixed it so that objects that got stuck outside of the lot would delete once you left the neighborhood, so it would be gone when it came back. That's not happening anymore.
So, I had this problem in the past where several guitars got stuck out in the "festival" area of the Spice Market neighborhood in San Myshuno. Nothing would work to get rid of them, not even the tip to "set object as head" then debug the object to remove it and then delete it. Those guitars were permanently stuck in the area and as festivals came and went, festival objects would place over top of them as if they weren't there (even though you could still pick them up and play them.
FINALLY it seemed like it was fixed, objects could not be deleted with the "set as head" trick--EXCEPT any games that had saved before the fix. SO, I had to save and transfer all of my sims/houses/etc. into a new game (which took forever and was a huge pain, mainly because I lost friendships and family relationships between sims who had moved into new households etc.,--suddenly my 2nd generation no longer knew their parents after moving out, so I had parents and kids flirting, etc!!!)
BUT, I was happy to go to all that trouble because the guitars were finally gone!
Now that I've purchased and have been playing Island Living, it seems like the problem is BACK in the exact same neighborhood! My Sulani-living sim went to the Spice Market for a festival and once it ended and new food stands came, I noticed that a violin was stuck on the lot.
No worries (I thought...) it should just disappear when I leave the neighborhood and be gone when it reloads. After all, that's the fix that was developed to resolve that problem (or at least that's how I understood it...). Well, that same sim just went to the Spice Market again and that violin is still there!
So, naturally I decided to try the "set as head" debug trick, but it didn't work. An enlarged COPY of the violin sets as head and then places when debugged so you can delete it, BUT the violin stuck on the festival area is STILL THERE!
PLEASE fix this again, as I REALLY don't want to start all over transferring all my sims/houses/lots into a fresh game to get rid of it AGAIN!
(Also, FYI, I DID search for this issue to see if anyone else is experiencing it, but the only posts I can find are from back in 2017 when this was a huge issue. So, perhaps not many have discovered the issue has returned yet...)
SO, after reading this thread, it sounds like the only way to fix the issue is to download a MOD?! Is that the case? I used to used mods and CC with Sims 3, but I made a decision to keep Sims 4 "pure" (at least until they're no longer making new packs to buy). But the violin that's stuck outside the lot is driving me crazy! Is my only option to get whatever mod was referenced in these posts in order to get rid of it?!