I own a minecraft realm with about 2-6 visitors per day. We have datapacks installed, and I update them regularly. In previous times, I took a backup save of the realm, put it into my single player realm, and inserted datapacks. I would then reupload them, with no problems at all. I've done this two times. This third time, I went through the same routine, except when I tried to upload the world, It wouldn't let me. It gave me this screen and won't change the game. I have about 32 datapacks, half of which are just loot table changes or adding scoreboards. I don't think the amount of datapacks are the problem.