Off grid lot challenge - infinity loading screen

Hello,

After searching this forum I came to the conclusion that the reason one certain househould wouldn't load is because of the lot they were on: one with the off the grid challenge. My problem: I didn't know about this issue when I left the game, so now I can't go into my save file because the last household I played with was the one on the bugged lot. I've seen that this issue can be resolved by removing the lot trait but I can not load the save file at all... I think? Or is there a way to load into a different household than the last one I played with?

Thanks for your help