error CS0111: Type 'PlayerController' already defines a member called 'Update' with the same parameter types

using System.Collections; using System.Collections.Generic; using System.Collections.Specialized; using System.Security.Cryptography; using System.Threading; using UnityEngine;

public class PlayerController : MonoBehaviour { public float WalkSpeed;

 //Private Variables
 Rigidbody rb;
 Vector3 moveDirection;




 // Start is called before the first frame update
 void Awake()
 {
     rb = GetComponent<Rigidbody>();
 }

 // Update is called once per frame
 void Update()
 {
      //Non-Physics steps  
 }

 void FixedUpdate()
 {
     //Physics steps
 }

  void Update()

 {

     //Get directional input from the user
     float horizontalMovement = Input.GetAxisRaw("Horizontal");
     float verticalMovement = Input.GetAxisRaw("Vertical");

     moveDirection = (horizontalMovement = transform.right + verticalMovement + Transform.forward).normalized;

     void FixedUpdate()
     {
         //Call the Move funtion
         move();
     }

     void Move()
     {
         //Here we define the Move funtion
     }

     void Move()
     {
         //Rigidbody.Velocity is a method which takes a Vector3
         //and controls the speed and direction of the GameeObject
         rb.Velocity = moveDirection * WalkSpeed * Time.deltaTime;


     }
 }

}