Can't get rid of Remove-only Map Stash Tab

- The remove-only map stash tab has all map tier/category counters at 0, except for the guardian map category, which is at 2, but all map counters for the separate guardian map types are at 0, and no guardian map items are visible.
- When I press CONVERT MAPS, I get this message: "Some maps could not be converted either due to lack of space, or no valid conversion found."
- My guardian map category in my actual map stash tab has space for each guardian map type.
- I don't know if this is related, but since I last tried to convert the (non existent?) maps, I get lots of lag despite none of it showing up as latency when pressing F1.

Edit:
- I just found: https://www.pathofexile.com/forum/view-thread/3325349
- This thread can be deleted.