Library items corrupted

Wyrmelin​ You might be able to get away with doing that by deleting the old tray folder and replacing it with the backup.  Don't just combine them by dropping the old tray folder on The Sims 4 folder.   Doing that might leave corrupted files.  If you want to save any of the households in the corrupted save folder, check them first by starting a new game and drop them in. The game will usually tell you that a household or build is corrupted when you try to install it.  

The thing is though; how did those items get corrupted?  There is a good chance that they corrupted at the time they were saved to your Library.  If that is the case, then the real issue may be that you save is corrupted.  You can play a corrupted save for a while but sooner or later, it will fail completely and you lose everything.  So, my suggestion for you is to save what households and builds you can and start over with a new save.

Hope this helps.

I'm noticing corrupted households in my library again. It's a bit different this time. It looks like only some Sims of these households are broken, and all of them are some sort of occults (ghosts or vampires).

Wyrmelin​  Do these new corrupted households have any similarities/commonalities like were they saved around the same time?  Did all of the corrupted households come from the same save?  Is there a common CC item on all of the affected sims?  Have you moved sims in or out of the affected households?  If the affected households live on a lot, does their home lot show any sign of corruption?  Is it just sims, or are lots affected too?  

I notice that all of the corrupted households appear to be Gallery sims.  How long have you had them (are they new/old)?  Did this issue start recently soon after downloading one or more households from the Gallery?

But, for it to continue happening, I suspect that you have something bigger going on.  I suggest you check your save over carefully by visiting at least one lot in every zone in live mode to look for signs of corruption.  Running a repair may be helpful.  Have you had any saving issues?  

Hope this helps.

Thank you for your answer. I can't find a response to all of these questions because I haven't played a lot these past months, and for all I know some of these households could have been corrupted for a long time before I noticed.

Do these new corrupted households have any similarities/commonalities like were they saved around the same time?

It looks like there are two patterns:
- most of the corrupted cases are occults (aliens, ghosts, vampires, werewolves). Very few corrupted cases are of regular Sims. Not all occults are corrupted though. But lots of them are. For 36 corrupted households found, only 4 of them concern non-occult Sims.
- These households look fine overall. Only individual Sims in these households have an issue: they don't have their individual portrait, and when I click on these, I get an error message telling me this object is corrupted, and offering a choice to delete them.
These guys have been saved during different times.

Did all of the corrupted households come from the same save?

I create all my new Sims on the same save, so a lot of these corrupted Sims do come from it, but not all my corrupted Sims do, and not all of the Sims coming from it are corrupted. It could be an unfortunate circumstance. I understand that regardless of my doubts, I should avoid this save now.

Is there a common CC item on all of the affected sims?

No, the majority of the corrupted households are devoid of any CC.

Have you moved sims in or out of the affected households?
If the affected households live on a lot, does their home lot show any sign of corruption?
Is it just sims, or are lots affected too?

I haven't played them in a while to be honest. Most of these guys are background characters. When I see them in game, they behave like normal Sims.

I notice that all of the corrupted households appear to be Gallery sims.

Yes. I collect premade Sims, so a considerable portion of my corrupted households do come from the gallery (I download all the premade Sims of the gallery page of Maxis). I also have some households uploaded by players. The majority of the corrupted cases of gallery households concern occults (aliens, vampires, ghosts, werewolves)

How long have you had them (are they new/old)?

It ranges between 2025 and 2021.

Did this issue start recently soon after downloading one or more households from the Gallery?

I am not sure.

The good news, I suppose, is I can still load these corrupted households in CAS to re-save them. But, is it okay to do so?