[1.7.10] java.util.ConcurrentModificationException\Ticking error

[ConsomeBomb]

When using the Gas Grenade from HBM's Nuclear Tech Mod on an NPC from the Custom NPCs Mod, It gives me this error after the NPC dies. Is there a fix for this error?

 

crash-2019-09-13_20.20.31-server.txt

[Animefan8888]

4 minutes ago, ConsomeBomb said:

When using the Gas Grenade from HBM's Nuclear Tech Mod on an NPC from the Custom NPCs Mod, It gives me this error after the NPC dies. Is there a fix for this error?

All I can say is that make sure you are using their most up to date versions and if that doesn't work you may have to remove one of them. Also for future reference 1.7.10 is old and no longer supported here.

[ConsomeBomb]

Well, HBM is the latest beta, and Custom NPCs is the latest of its releases for 1.7.10. Would an older version or the latest version of Forge fix the issue possibly?