Unable to load world after update to 4.6.0 on Neoforge 1.21.1

[akanealw]

Neoforge 21.1.97
Minecraft 1.21.1

After updating Megacells from 4.5.0 to 4.6.0, my world fails to load and has a datapack error. If I downgrade back to 4.5.0, it will load my world again.

Log is here https://paste.atlauncher.com/view/cba13471-b9ec-4609-b9c0-7c8996457fe1

I did see an error in the log about MysticalAgriculture, which I did have installed at one point, but I removed it and all the configs before this upgrade to 4.6.0.

Thanks!

[62832]

This is due to a bug with NeoForge itself (neoforged/NeoForge#1886 / neoforged/NeoForge#1889) where remove entries in data maps are treated as required at runtime as opposed to optional. As advised in the latter linked post, update to NF 21.1.104 to resolve this.