I have an old Minecraft world (old as in January of this year) that was last used in 1.17.1. I want to try and load it in the latest 1.18 snapshot however I'm having issues. When I first try to load it it'll say something like "The datapacks are having issues." And then it will either let me load it in safe mode or go back to the title screen. I've had the Caves and Cliffs Part 2 datapack installed, but whether or not I delete it or just click "safe mode" and don't delete it it'll just load up to 100 percent and then kick me and say "invalid player data" and I'll be in the multiplayer tab for some reason. And when I go back to the single player tab it will have deleted my world and I'll need to reinstall it from a backup.