The object of type 'GameObject' has been destroyed but you are still trying to access it.

Error

I found this error. How I fix It

Code destroy:

         if (collision.gameObject.CompareTag("O"))
         {         
                 tutorial.t = true;
                 Debug.Log("3");
                 Destroy(collision.gameObject);
         }

Code what I think makes this error:

         if (Ball.active == true)
         {
             point.SetBool("entered", true);
             point.SetBool("enter", true);
             Time.timeScale = 1;
             O.SetActive(true);
 
         }
         else if (Ball.active == false)
         {
             point.SetBool("enter", false);
             O.transform.position = new Vector2(0, 6.11f);
             O.SetActive(false);
         }

Please tell me how I fix it.