Bug description
Server gets stuck at "Preparing spawn area" and the only message after that is:
"[Server thread/WARN] [minecraft/EntityDataManager]: defineId called for: class de.maxhenkel.car.entity.car.base.EntityCarInventoryBase from class de.maxhenkel.car.entity.car.base.EntityCarLockBase"

Steps to reproduce the issue

1. Start the server
2. See the error

Expected behavior
Console output doesn't stop and server continues to prepare spawn area and starts up

Log files
debug.log https://gist.github.com/Gorbiel/3dc4cb82d8618c8edfccda3770a284f0
latest.log https://gist.github.com/Gorbiel/a162a1b5a2f30ee11301373b03ba5f01
start.bat https://gist.github.com/Gorbiel/fc3e6e3456d37a1de942dfe47ab0d5cc

Versions

• Minecraft 1.16.5
• Forge 36.2.31
• Mod 1017

Other mods
modlist: https://gist.github.com/Gorbiel/8115667cc0df53e0ba5b7a4bbb8c253e

This version is not actively supported anymore.
I will only provide support/bug fixes for the last 2 major Minecraft versions (1.17.1 and 1.18.2)