"The type 'Cameras' already contains a definition for 'Camup'"

I keep getting the error “The type ‘Cameras’ already contains a definition for ‘Camup’” how do i fix

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Cameras : MonoBehaviour
{

    public Camera office;
    public Camera camera1;
    public Camera camera2;
    public Camera camera3;
    public Camera camera4;
    public Camera camera5;
    public Camera camera6;
    public Camera camera7;

    public GameObject CamUp;
    public GameObject CamDown;


    // Start is called before the first frame update
    void Start()
    {
       office.gameObject.SetActive(true);
       camera1.gameObject.SetActive(false);
       camera2.gameObject.SetActive(false);
       camera3.gameObject.SetActive(false);
       camera4.gameObject.SetActive(false);
       camera5.gameObject.SetActive(false);
       camera6.gameObject.SetActive(false);
       camera7.gameObject.SetActive(false);

       CamUp.SetActive(true);
       CamDown.SetActive(false);
    }

    // Update is called once per frame
    void Update()
    {
        
    }

    public void CamUp()
    {
       office.gameObject.SetActive(false);
       camera1.gameObject.SetActive(true);
       camera2.gameObject.SetActive(false);
       camera3.gameObject.SetActive(false);
       camera4.gameObject.SetActive(false);
       camera5.gameObject.SetActive(false);
       camera6.gameObject.SetActive(false);
       camera7.gameObject.SetActive(false); 

       up.SetActive(false);
       down.SetActive(true);  
    }

    public void CamDown()
    {
       office.gameObject.SetActive(true);
       camera1.gameObject.SetActive(false);
       camera2.gameObject.SetActive(false);
       camera3.gameObject.SetActive(false);
       camera4.gameObject.SetActive(false);
       camera5.gameObject.SetActive(false);
       camera6.gameObject.SetActive(false);
       camera7.gameObject.SetActive(false);

       CamUp.SetActive(true);
       CamDown.SetActive(false);   
    }
}

Change either the void named “CamUp”, or the Game Object, you can’t have two variables with the same name.