How to Auto-Repair an item?

I'm trying to make an item that, while you run, automatically repairs.

I've tried adding damage as a negative value
https://i.imgur.com/JmSCUoq.png
 

And I've also tried subtracting the damage
https://i.imgur.com/3UfKmBh.png

And nothing's worked so far.
I'm using MCreator 2024.2 and trying to make a Curios item