LineTrace is done by every Child Blueprints

I have got a little problem, which I could not solve. I have got only 1 Base c++ Character class and many child blueprints of it. And everytime when I try to do a LineTrace with the possesed character the logs show that the linetrace is done for all childcharacters placed in the scene.
I have got 2 placed in the world and 1 is spawned when I start the game. And when I press space ( linetrace input) it shows me 3 different logs.

Is there any way to tell the programm to only do the linetracing for the character who is actually shooting.

I am sorry for my english, but I hope you understood what I wanted to say.