@Permission in sub-commands working in other commands

The current class:
https://paste.labymod.net/wabagofudojijuveneha.kotlin

When I do /pickaxe, get no permission message.

When I remove "skin" method, works without perm (the correct): https://paste.labymod.net/osabiworuqugonabikal.kotlin

Using "2.0.0-beta.2", paper 1.20.4 and kotlin
the suggestion on skin: https://paste.labymod.net/eyuxuwawokiriwezaxab.kotlin
idk if I'm using it wrong