Prevent collision with Specific actor by UPawnSensingComponent

hello i’m new in the forum ,my first message so hey to all .
I Build a Game in which I have a Black hole with outer and inner sphere (class of AActor) in addition I had a character(AIguard) that has UPawnSensingComponent component and BP That inherit from it ,when I spawn the character and place it in the range of the black hole , it immediately collide with it and so it cant see my pawn ,I try to configure the collisions in the black hole to physics only ( cause I assumed the collision done in UPawnSensingComponent is done by raycast) but it doesn’t succeeds unfortunately ,I will appreciate any help to solve this problem.
best regards ,
Gal