NodegroupA and nodegroupB containing nodegroupA cannot exist in the same material

[HSDSZ]

Malt version

node-groups-latest

Blender version

Blender 4.1.1

OS

win 11

Hardware info

intel i5-12400F RTX3060Ti

Issue description and reproduction steps

nodegroup2 contains nodegroup1. If nodegroup1 is already in a material, nodegroup2 cannot.

Attachments

bug.zip