Can't modify ScriptableObject value.

So, I have a ScriptableObject which stores the KeyCodes for the player input:

InputController.cs:

     using System.Collections;
     using System.Collections.Generic;
     using UnityEngine;
     
     [CreateAssetMenu(fileName = "InputController", menuName = "ScriptableObjects/InputController", order = 1)]
     
     public class InputController : ScriptableObject
     {
         public KeyCode jump;
         public KeyCode left;
         public KeyCode right;
         public KeyCode shoot;
         public KeyCode hover;
         public KeyCode dash;
     }

The initial key values are assigned from the inspector, but I want to be able to change them from the options menu during runtime, so I created coroutine in another file, and that coroutine is called inside a function, which itself is assigned to a button.

The coroutine waits for me to press a key, and is supposed to assign that key to the corresponding action, in this case, jumping:

UI.cs:

 public List<InputController> warshControls = new List<InputController>();
 //This list stores the two ScritableObjects containing the control keys for the two players, assigned in the inspector.
 
         IEnumerator changeKey(KeyCode key)
         {   
         bool waitforInput=true;
         pressKeyText.text="Press a Key!";
         while(waitforInput)
         {
         foreach(KeyCode vKey in System.Enum.GetValues(typeof(KeyCode))){
                 if(Input.GetKey(vKey)){
                     key=vKey;
                     waitforInput=false;
                     pressKeyText.text=" ";
                     Debug.Log(key);
                     Debug.Log(warshControls[0].jump);
                 }
             }  
             yield return null;  
         }
     }
     
     public void setPlayer1Jump()
     {
         StartCoroutine("changeKey", warshControls[0].jump);
     }
     //This is the function assigned to the button, it calls the coroutine to change the jumping key for Player1.

According to the Debug Logs, the value of the parameter "key" does change to whatever key I pressed, but for some reason the value of the argument I passed stays the same, meaning if the value of "warshControls[0].jump" was the key Z by default, and I called the coroutine and I pressed the key M, "key" would be M, while "warshControls[0].jump" would stay Z for some reason.

However, if I replace the line "key=vKey;" with "warshControls[0].jump=vKey;", the KeyCode value does actually change (And even persists after Play Mode is turned off which is a different problem entirely), but I want to be able to choose what KeyCode to modify, so I want this problem solved.