How do I stop the enemy AIs from damaging each other using SphereTraceByChannel?

I tried this, but for some reason nothing is being traced, and even when I set the draw debug type to duration nothing appears either. I also changed the players mesh and capsule collisions object type but that doesn’t seem to work as well. Am I misunderstanding something?

Here’s a screenshot of the changes with the blueprint:

EDIT: Never mind its working now for some reason after I reopened the editor.