Problem with Playerprefs not saving

Hi fellow game developers, i've been developing a simple mobile game that has a vehicle selector and a weapon selector, i've created the Vehicle selector first and it worked perfectly, but when i did the weapon one, Playerprefs didn't bother to save the selected weapon.

I've used the same code but changing the obvious variables so it gets the weapon array, so idk why it doesn't work, maybe it's a simple mistake that i'm not seeing but i've been trying to solve this for 1 week and idk what should i do.

This is the "Saving" Script

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.SceneManagement;
 
 public class CharSelector : MonoBehaviour
 {
     [SerializeField]
     private GameObject [] characterList;
 
     private int charIndex;
 
     [SerializeField]
     private GameObject [] weaponList;
 
     private int wepIndex;
 
     public int Coins_To_Unlocked;
     public GameObject Next_Level;
     public int max_level;
     public string num_level;
     public static int thelevel;
     public int t;
 
     // Start is called before the first frame update
     void Awake()
     {
         PlayerManager.numberOfCoins = 0;
         thelevel = PlayerPrefs.GetInt("thelevel", thelevel);
     }
 
     void Update()
     {
         for (int o = 1; o < max_level; o++)
         {
             if (PlayerManager.numberOfCoins == Coins_To_Unlocked && Events.level == o)
             {
                 Next_Level.SetActive(true);
             }
         }
     }
     public static void the_level(int t)
     {
         thelevel = t;
         PlayerPrefs.SetInt("thelevel", thelevel);
     }
     public void Next()
     {
         PlayerPrefs.SetInt("CharacterSelected", charIndex);
         PlayerPrefs.SetInt("WeaponSelected", wepIndex);
         Events.NextLevel();
         SceneManager.LoadScene("Nivel 1");
     }
     public void _level()
     {
         the_level(t);
         SceneManager.LoadScene(num_level);
 
     }
 
     public void ChangeVehicle(int index)
     {
         for (int i = 0; i < characterList.Length; i++)
         {
             characterList[i].SetActive(false);
         }
         this.charIndex = index;
         characterList[index].SetActive(true); 
     }
 
     public void ChangeWeapon(int pistol)
     {
         for (int j = 0; j < weaponList.Length; j++)
         {
             weaponList[j].SetActive(false);
         }
         wepIndex = pistol;
         weaponList[pistol].SetActive(true);
     }
 }

and those are both Loader Scripts, the Vehicle one:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class CharLoader : MonoBehaviour
 {
     [SerializeField]
     private GameObject[] characterPref;
     public GameObject jugador;
 
 
     // Start is called before the first frame update
     void Start()
     {
         LoadCharacter();
     }
 
     // Update is called once per frame
     void Update()
     {
 
     }
 
     private void LoadCharacter()
     {
 
         int charIndex = PlayerPrefs.GetInt("CharacterSelected");
 
         if (charIndex < 0)
         {
             Instantiate(characterPref[0]);
         }
         else
         {
             Instantiate(characterPref[charIndex], jugador.transform);
         }
 
     }
 }

and the Weapons one:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class WeapLoader : MonoBehaviour
 {
     [SerializeField]
     private GameObject[] weaponPref;
     public GameObject jugador;
 
     void Start()
     {
         LoadWeapon();
     }
 
 
     private void LoadWeapon()
     {
         int wepIndex = PlayerPrefs.GetInt("WeaponSelected");
 
         if (wepIndex < 0)
         {
             Instantiate(weaponPref[0]);
         }
         else
         {
             Instantiate(weaponPref[wepIndex], jugador.transform);
         }
     }
 }

thanks for the help in advance.