Minecraft realms Error 6003 upload limit reached

I uploaded a few maps, then I tried to upload a map, and it says upload limit reached. I reset the map, and try the map that I ALREADY uploaded earlier, and it still says upload limit reached. It has NOTHING to do with the world size, becuase I tried to upload the same map, which was already uploaded earlier. Please help. Thanks. Don't say it's world size, if you do, you're wrong.