Game generating all npc sims to wear hats in clubs/gatherings

Hi I have since found that only certain gatherings and locations are affected, went to Nawall arms in windenburg all npc wearing hats and also in Windenburg, yet went to pan eoropa nightclub, all hats were gone, plus all hats gone in oasis springs, game generates hats not all the time it seems, i have removed the cc hats being generated, will see what happens, its just I dont want to loose anything, if you can give me steps to put everything back, i can then try if last did not work