Anki doesn't remember my progress anymore

When I opened Anki a couple of days ago I noticed that all my cards were listed as “new” again, even the ones in decks I had completed the night before. I also noticed that this wasn’t happening with all my decks- some were still functioning as intended. I went into the settings for one of the decks and noticed that everything was messed up- for example, the daily limits for new cards was set to 9999 instead of 20. I reset everything to standard settings. This is when I noticed that this hadn’t just changed the daily limit on that one deck, but all the decks in the collection of decks it was included in.

I’ve tried removing the deck pack and adding it again, I’ve tried reinstalling Anki, but nothing seems to work. Can anybody help?