Can not change binding for Vive tracker.

Hi, I am following the unreal documentation to set up the steam VR input system for my project.

The problem is that in my case, the edit button for the vive tracker is not working. ( as you see in the picture below)

This is the link of documentation I am using and for the controller it works fine but when I try to set the input action for Vive tracker, the edit button is not working.

I put a screen shot of the tutorial.