Saved gallery households duplicates

I've never had this issue before but for some reason literally all my households that are saved to my gallery are suddenly all duplicate like shown below:

I tried deleting one of the duplicates but that breaks both household saves for some reason, it shows this grey image and when I click on it it says "Item is corrupted, would you like to delete it?" so then the whole saved sims are just gone... instead of just one of the duplicates. How can I fix this?