Physics2D.IgnoreCollision Not Working

Hey guys, the following script isn't working. When the collider enters the enemy, it doesnt ignore the collision, but collides and bounces off. ALL COLLISIONS WERE IGNORED!!!! and Enemy was hit are logged and shown when the collision happens, but they bounce off anyway. Can someone please help? Thanks in advance! This is a 2D game.

 void OnCollisionEnter2D(Collision2D collision)
 {
     if (collision.gameObject.CompareTag("Player"))
     {
         Debug.Log("player is dead");
     }
     else if  (collision.gameObject.CompareTag("Prison"))
     {
         
     }
     else if (collision.gameObject.CompareTag("Enemy"))
     {
         Physics2D.IgnoreCollision(collision.collider, gameObject.collider2D);
         if (Physics2D.GetIgnoreCollision(collision.collider, gameObject.collider2D))
         {
             Debug.Log("ALL COLLISIONS WERE IGNORED!!!!");
         }
         Debug.Log("Enemy was hit");
     }
     else
     {
         Destroy(this.gameObject);
     }

 }