Crash when trying to add or edit skill gem

In this build: https://pobb.in/PGWCqREs7Y2d
Go to Skills, select any of the "No active skills" groups (they are gems in The Whispering Ice staff) and try to add a new gem, or change the existing gem.

Result:

<img width="866" height="436" alt="Image" src="https://github.com/user-attachments/assets/d5c5cedb-02d6-4ba0-9de5-27770686c4b7" />
