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Describe the crash
Server randomly crashes when a player is near a custom structure or a village with a village lord

To Reproduce
Seems to happen when a player stays and interact enough with the village.

Crash Log
Server Crash Report Ver 2.77 pre-Release.txt

Info (please complete the following information):

• Modpack Version: 2.77 Pre-Release
• Server or Singleplayer: Server
• Version the world was created on: 2.77 Pre-Release (with orespawn3.json config edited)

Additional context
Admin was on grassland biome inside the village, player was heading towards an abandoned hut custom structure in a steppe hill.

Related to https://github.com/crazysnailboy/VillagerTrades/issues/32. This mod has been removed in upcoming version and we'll try to add it again at a later date.