How to make Camera Snaps from one area to another?

i was going to make a Camera mechanic like one in Castlevania, Megaman, etc, where your camera moves and snaps to the next Area if you enter a doorway(OnTrigger). here's how it works

 private void OnTriggerEnter2D(Collider2D collision)
     {
         if (collision.gameObject.CompareTag("Transition"))
         {
             Debug.Log(FieldIndex);
             FieldIndex++;               
             Field[FieldIndex-1].SetActive(false);
             Field[FieldIndex].SetActive(true);
             PlayerCamera.transform.position = new Vector3(Field[FieldIndex].transform.position.x, Field[FieldIndex].transform.position.y, PlayerCamera.transform.position.z);
         }

This is for the player script. the player itselfs automatically moves. and i have an array consist of 10x10 tilemaps. but the problem is it won't doing it's second transition. so when the array reaches the third field(index 2), the camera won't snap on the next field. i know there's an alternative, where you have to disable(Setactive) each camera that becomes the area's children gameobject. but i wanted to keep it only using single camera. so how to fix this?