Вылезает ошибка CS0111: Type already defines a member called 'Update' with the same parameter types

вот код:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class LookAtMouse : MonoBehaviour
{
public float offset;
void Update()
{
Vector3 diference = Camera.main.ScreenToWorldPoint(Imput.mousePosition) - transform.position;
float rotateZ = Mathf.Atan2(diference.y, diference.x) * Mathf.Rad2Deg;
transform.rotation = Quaternion.Euler(0f, 0f, rotateZ * offset);
}
}