Hello,

We have a few users within our mod pack who will experience this crash randomly. I have replicated it myself by just using AgriCraft and playing for a few hours. Once it happens, you will not be able to use that save again.

Crash - https://gist.github.com/Ryahn/a0207b73a5e557e809711b41b4c742fc

Fixed by switch to JSONs in 2.0.0.