Additional AI character sphere collision

Help me please. I lost a lot of time whith this. I have an AI Character whit an additional sphere Collision attached to the head (he is a quadruped). Collisions are ok, but when it is moving and collides with my character, my character is pushes away. How can i fix it ?

Hello! What collision channel is used for that sphere? Also do you want it to overlap or overlap and block?