Save File Randomly Corrupted Even Though The Day Before It Was Working Fine: [java] Version 1.20.1

I'm currently designing a house in a creative world, (which is the one that corrupted), and I was working on it completely fine until today for some reason. I go to log onto the world and it doesn't load and my game stops responding. I've tried renaming the level.dat_old folder and tried making another world with the same world seed and copied over the level.dat file but the only thing that loaded when I did that was my inventory, not the base or anything else I was building in that world. It is also important to know that this was on a modded version on CurseForge so I'm not sure if that has anything to do with it. I've spent around 12 hours on it already and I would hate to have to rebuild everything so any help would be greatly appreciated.