Error: You have reached the maximum number of items in collection

I guess I must be the heaviest user of collection on civitai 😅

The error message is "Unable to update item

You have reached the maximum number of items in collection"

This happens to ALL my collection, not just my very large "SDXL Sampler". It even happens while I try to remove an item from the collection.

I also get this message while trying to add new entries into the "404 contest".