Describe the bug
A clear and concise description of what the bug is.
When monsters were fighting each other at night, this crash suddenly happened

To Reproduce
Steps to reproduce this bug.

1. time set to night
2. monsters fighting each other

Expected behavior
A clear and concise description of what you expected to happen.
they fight each other

Screenshots
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Environment

• OS: Windows 10 64 bit
• Java Version: 1.8.0_321 b07 64bit
• Minecraft Version: 1.12.2
• Forge Version: 14.23.5.2860
• the legend of herobrine Mod Version: 0.5.4
• champions mod version: 1.0.11.10

Additional context
Add any other context about the problem here.

here is the crash log:
https://gist.github.com/rebarakuk/ff3f6cfc7fd3f84ef88a9613d21003c1

Legacy 1.12.2 is no longer being worked on since I don't have the time to keep multiple branches open by myself