custom armor model crashes game whenever I put it on

Crash log to pastebin and link here

Please, answer how you solved your error?

I got the same problem with minecraft 1.20.4

https://pastebin.com/7s0tahSB

1. java.util.NoSuchElementException: Can't find part cube_r1

Armor only supports parts body, head, legs, arms - same parts and names as biped model

Could you help me? I got the same problem.
https://pastebin.com/QbHS20Tv

1. java.util.NoSuchElementException: Can't find part dragonhelmet

As I said:

Armor only supports parts body, head, legs, arms - same parts and names as biped model

So i have to name the part difference?(Not head,legs,arms,body)

Or i have to ungroup all?

Got it, thank you!

Hey, I am a bit late to the war, but same problem here, I tried giving it no procedures at all, just a basic 3D model for armor. But every time I press F5 or put it on an armor stand, it crashes the game.

i fixed it