Bug Boolean not changing

Objective - To change the position of door(PortalGuard) if user acquires 4 keys and touches the door.
Problem - bool key1, key2, key3, key4 are not updating to true.
I changed then to be true at once and then the door opened. But I want to initialise them at false and chage to true one by one once user touches them.
Code attached below.

Code (CSharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5.  
6. public class KeyAcquired : MonoBehaviour
7. {
8.     public GameObject key1;
9.     public GameObject key2;
10.     public GameObject key3;
11.     public GameObject key4;
12.     public GameObject portalGuard;
13.     public GameObject portalGuardText;
14.     public ParticleSystem accquiredEffect;
15.  
16.     private bool gkey1;
17.     private bool gkey2;
18.     private bool gkey3;
19.     private bool gkey4;
20.  
21.     // Start is called before the first frame update
22.     void Start()
23.     {
24.         Debug.Log("Keys Acquired Script is running");
25.         gkey1 = false;
26.         gkey2 = false;
27.         gkey3 = false;
28.         gkey4 = false;
29.     }
30.  
31.     // Update is called once per frame
32.  
33.     public void OnTriggerEnter(Collider other)
34.     {
35.         if (other.gameObject.tag == "Key1")
36.         {
37.             gkey1 = true;
38.             Instantiate(accquiredEffect, key1.transform.position, transform.rotation);
39.             key1.transform.position = new Vector3(5000, 5000, 5000);
40.         }
41.         if (other.gameObject.tag == "Key2")
42.         {
43.             gkey2 = true;
44.             Instantiate(accquiredEffect, key2.transform.position, transform.rotation);
45.             key2.transform.position = new Vector3(5000, 5000, 5000);
46.         }
47.         if (other.gameObject.tag == "Key3")
48.         {
49.             gkey3 = true;
50.             Instantiate(accquiredEffect, key3.transform.position, transform.rotation);
51.             key3.transform.position = new Vector3(5000, 5000, 5000);
52.         }
53.         if (other.gameObject.tag == "Key4")
54.         {
55.             gkey4 = true;
56.             Instantiate(accquiredEffect, key4.transform.position, transform.rotation);
57.             key4.transform.position = new Vector3(5000, 5000, 5000);
58.         }
59.         if(other.gameObject.tag == "PortalGuard")
60.         {
61.             if(gkey1 && gkey2 && gkey3 && gkey4)
62.             {
63.                 Instantiate(accquiredEffect, portalGuard.transform.position, transform.rotation);
64.                 portalGuard.transform.position = new Vector3(5000, 5000, 5000);
65.                 portalGuardText.transform.position = new Vector3(5000, 5000, 5000);
66.             }
67.         }
68.     }
69. }
70.  

 

Are your colliders set to trigger mode?