https://pastebin.com/7zVyyfEm

crashed while exploring

Did you alter the loot tables by any chance? I had the same crash after tweaking loot values and missing a bracket in the config. Didn't have any issue afterwards and I'm also using apotheosis.

Actually no i didnt alter anything. Maybe the mod extra caves does that by itself but i just added mods ^^

It looks like some very rare issue caused by two structures getting generated at the same time in the same place. At least thats my guess. I've added some safety checks in the latest update so it should at least not crash if that does happen again...