Movement Script stops working

Hi, I'm trying to make a game and I have 2 players on the same screen. Each of them has its own movement script, but when I move Player 2 and then stop its movement both scripts stop working. These are the scripts:

Player 1:

 using UnityEngine;
 
 public class VehicleMovement : MonoBehaviour
 {
     public Rigidbody rb;
     public float movementForce = 100f;
 
     void Update()
     {
         if(Input.GetKey("s"))
         {
             rb.AddForce(movementForce * Time.deltaTime, 0, 0);
         }
         if(Input.GetKey("w"))
         {
             rb.AddForce(-movementForce * Time.deltaTime, 0, 0);
         }
     }
 }
 

Player 2:

 using UnityEngine;
 
 public class VehicleMovement1 : MonoBehaviour
 {
     public Rigidbody rb;
     public float movementForce = 100f;
 
     void Update()
     {
         if(Input.GetKey("down"))
         {
             rb.AddForce(movementForce * Time.deltaTime, 0, 0);
         }
         if(Input.GetKey("up"))
         {
             rb.AddForce(-movementForce * Time.deltaTime, 0, 0);
         }
     }
 }

I hope someone can help me and thanks in advance!