Question Coroutine + List not working

I am new to Unity and coding in general, I made this script for a project of mine, what it is supposed to do
is make a list of 6 different randomly chosen numbers, it seems to be working well except for two things, I get an infinite loop and I think that the coroutine that I marked as failedRoutine is not stopping, causing a massive list creation.

Somebody can tell me what I am doing wrong?

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class TESTING : MonoBehaviour
6. {
7.  
8.     private void Start()
9.     {
10.         currentRoutine = StartCoroutine(CreateShop(0));
11.     }
12.     Coroutine currentRoutine;
13.  
14.     Coroutine failedRoutine;
15.  
16.     List<float> itemsAlreadyInShop = new List<float>();
17.     IEnumerator CreateShop(float times)
18.     {
19.  
20.  
21.         float number;
22.  
23.  
24.         yield return new WaitForSeconds(0.25f);
25.  
26.         if (times > 5)
27.         {
28.  
29.         }
30.         if (times < 6)
31.         {
32.  
33.  
34.             number = Random.Range(1, 12);
35.  
36.            
37.             itemsAlreadyInShop.Sort();
38.             foreach (float item in itemsAlreadyInShop)
39.             {
40.                 if (item == number)
41.                 {
42.                     float stringTimes;
43.                     stringTimes = times + 1;
44.                     print("Routine " + 1 + stringTimes.ToString() + " failed because the randomized number " + number.ToString() + " equals our list item " + item.ToString());
45.                     failedRoutine = currentRoutine;
46.                     currentRoutine = StartCoroutine(CreateShop(times));
47.                     StopCoroutine(failedRoutine);
48.                 }
49.             }
50.  
51.  
52.             itemsAlreadyInShop.Add(number);
53.             print("new item in list! number: " + number.ToString());
54.  
55.            
56.  
57.             times++;                          
58.             print(times + " rutine is done");
59.             print("item is " + number);
60.             print("current list is:");
61.             foreach (float item in itemsAlreadyInShop)
62.             {
63.                 print(item.ToString());
64.             }
65.             currentRoutine = StartCoroutine(CreateShop(times));
66.         }
67.     }
68.  
69. }

 

I already solved the problem using a different method