Modify Current Hit Actor of multiple actors of same class

Im trying to update a static mesh using “Set Static Mesh” on the actor that is hit with a line trace, it works fine but for one simple floor, it is changing the mesh on all the actors spawned in the same class. So if I have 3 actors in the world all “MyActorBP” it will change all of them, so how do I only change the one that was hit?

Ive replaced the actor instead of the mesh as I forgot a instance and not be modified