1.15.2 Weird Registry Mapping event error

[matezz]

Hello,

I want to fix my mod's mappings, because I've updated some block and item ID's. Configured event

RegistryEvent.MissingMappings<Block> event

and it is working. My code is:

and I'm getting weird error after completing this event. It tells me "Remapped...", 0 errors. But the error is:

So the error comes not from my class, but from GameData.Tells me that com.matez.wildnature.common.blocks.BlockSlabVertical cannot be cast to net.minecraft.item.Item. And i'm even not doing anything with items yet! Sometimes it tells also Exception reading .\saves\World\level.dat_old java.lang.ClassCastException: net.minecraft.item.BlockItem cannot be cast to net.minecraft.block.Block
What's the matter?

[Draco18s]

I don't know why you've insisted on posting your code (and the error) as images. Those things are 100% text.

[matezz]

mostly to keep formatting

Catch the code

https://gist.github.com/e53a0f34afa79b80aef9909047c43ac5
https://gist.github.com/75d4e37e8367fd644db8fd1cf83a1738

[Draco18s]

That's what the code block does.  Click the <> button when posting. 

Edited November 2, 2020 by Draco18s