Why do you try to attach this actor every tick?
And, if that attachment says “attach actor to self” then the actor you get in the “Get Actor By Class” return value is the same as the actor that ticks.
And, in On Begin Overlap, you’re trying to attach an actor to nothing.
Whatever you’re trying to do, doesn’t make sense to me. I don’t know what to suggest here, because the fundamentals of this blueprint doesn’t tell me what you actually want.