@wintersoldier038 You don't need to do that unless your old save is corrupted. Here's an order to do things in:
1. Start a New game to see if CAS is behaving okay now.
2. Exit Sims 4
3. Copy your saves files out of the old Saves folder into the new Saves folder. Keep the old copy there, though, in case putting mods back breaks it again.
4. Start Sims 4, load your old save, and see if CAS is behaving okay now.
If CAS is now okay in your old save, you can start copying mods back in, but don't copy back anything list broken, and make sure mods that needed an update got one: Broken/Updated Mods & CC .
If you do have problems in the old save, you can use Manage Households to load households in CAS and save them to your Library (this is the Tray folder, and you'll have made a new one of those too. You can copy the old Tray files into the new folder too.) You can then import those households into a new save, but they won't know each other anymore. I use clubs to get them to know each other again, MC Command Center to fix their family relationships between households, and UI Cheats Extension to fix relationship levels.