GetComponent<SpriteRenderer>().sprite changes sprite to none

Hi, i can't find solution and understand why it doesn't work

Code (CSharp):

1. public class mainController : MonoBehaviour
2. {
3. private int skinIndex;  
4. public Sprite lolidefault,whitered,red,green,loliyellow,lolired,loligreen;
5.  
6.     public void ChangeSkin()
7.     {
8.         switch (skinIndex)
9.         {
10.             case 0:
11.             {
12.                 GetComponent<SpriteRenderer>().sprite = lolidefault;
13.                 break;
14.             }
15.             case 1:
16.             {
17.                 GetComponent<SpriteRenderer>().sprite = whitered;
18.                 break;
19.             }
20.             case 2:
21.             {
22.                 GetComponent<SpriteRenderer>().sprite = red;
23.                 break;
24.             }
25.             case 3:
26.             {
27.                 GetComponent<SpriteRenderer>().sprite = green;
28.                 break;
29.             }
30.             case 4:
31.             {
32.                 GetComponent<SpriteRenderer>().sprite = loliyellow;
33.                 break;
34.             }
35.             case 5:
36.             {
37.                 GetComponent<SpriteRenderer>().sprite = lolired;
38.                 break;
39.             }
40.             case 6:
41.             {
42.                 GetComponent<SpriteRenderer>().sprite = loligreen;
43.                 break;
44.             }
45.         }
46.     }
47.     private void Start()
48.     {
49.         ChangeSkin();
50.     }
51. }

I did assign variables to sprites
It does change the sprite but instead to one of them changes to "none"

 

Likely your sprite is never loaded correctly. Sprite lolidefault = Resources.Load<Sprite>("Graphics/Sprites/sprite")

 

Have you populated the sprite references in the inspector? If you have, you may have accidentally added the maincontroller to more than one object so one is assigning the sprite and the other is setting it null.