I think the space on my list is all used up

I tried to mark a season “Watched”. This worked for me before. Now it doesn’t. and I got a pop-up that said “Trakt rate limit reached: 429”
I have no idea what that means. Is it saying that the list of every show is full? Because I am sure not everything on a list of 429 (if that is what it means)is stuff that I am currently watching. I finished a lot of shows and deleted them from my playlist. How do I get back the space that I have already used, or create more space or something?

That’s an API rate limit you’re hitting. What app is giving you this error? In general, it just means the app is hitting the app too much at once. It should work when you wait a few seconds.