Minecraft version - 1.20.1
Mod loader - Forge
Mod version - 1.8.5 + 1.20.1
I am using the latest version available - yes

Describe the bug
When trying to join a world with both mods installed, the game crashes.

To Reproduce
Steps to reproduce the behavior:

1. Add "Better Combat 1.8.5 + 1.20.1" and "Balkon's Weaponmod: Legacy 1.20.1-1.21.0
2. Launch the modded game
3. Try to join a world
4. See error:
   java.lang.NullPointerException: Cannot invoke "net.minecraft.resources.ResourceLocation.equals(Object)" because "attributeId" is null

Expected behavior
I expected the game to work normally with these two mods

Screenshots or video recordings
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Additional context
Add any other context about the problem here.

I have fixed this myself in #378. However, the fix has not yet been published.
Also @ZsoltMolnarrr: my fix has not yet been ported to other versions of Better Combat - only 1.20.1.
However, it also affects other versions as well. These should receive the same treatment :)

Fix released as part of BetterCombat 1.8.6

Feel free to reopen if the issue resurfaces.