[Solved] Help with a simple endless level generator.

Hi, Im a beginner coding and im programming a very simple procedural map (idk even if this is a procedural generation lol) but i got stuck. I have two scripts, the first one instantiate the "Ground" gameObject and the other destroy the previous "Ground" gameObject. But this happens: https://imgur.com/hwctmRM

My scripts:

PlayerCollisions

 using UnityEngine;
 
 public class PlayerCollisions : MonoBehaviour
 {
 
     public GameObject Spawner;
     public GameObject Ground;
 
     void OnTriggerEnter(Collider other)
     {
         switch (other.tag)
         {
             case "InstantiateGround":
                 Spawner.GetComponent<GroundSpawner>().SpawnGround();
                 break;
             case "DestroyGround":
                 Ground.GetComponent<GroundDestroyer>().DestroyGround();
                 break;
         }
     }
 }

GroundSpawner

 using UnityEngine;
 
 public class GroundSpawner : MonoBehaviour
 {
 
     public GameObject Ground;
     public Collider PlayerCollider;
     Vector3 GroundLong;
 
     //Awake gets the scale of the Z coord and stores it in GroundLong vector.
     void Awake()
     {
         GroundLong = new Vector3(0, 0, Ground.transform.localScale.z);
     }
 
     //----------------------------------Custom Funtions----------------------------------
         //SpawnGround instantiate the next ground by adding GroundLong vector to the current ground position.
     public void SpawnGround()
     {
         Ground = Instantiate(Ground, Ground.transform.position + GroundLong, Ground.transform.rotation);
     }
 }

GroundDestroyer

 using UnityEngine;
 
 public class GroundDestroyer : MonoBehaviour
 {
     //----------------------------------Custom Funtions----------------------------------
     //DestroyGround destroy the previous Ground.
     public void DestroyGround()
     {
         Destroy(gameObject);
     }
 }