Error: Transition '' in state 'breath' uses parameter '' which does not exist in controller.

Error: Transition '' in state 'breath' uses parameter '' which does not exist in controller.

 public void Control ()
 {
     float velx = 0;
     if (Input.GetKey(KeyCode.D))
     {
         velx = speed;
         sprite.flipX = true;
     }
     else if (Input.GetKey(KeyCode.A))
     {
         velx = -speed;
         sprite.flipX = false;
     }
     maria.velocity = new Vector2(velx, maria.velocity.y);
     anim.SetBool("move", velx != 0);
 }