unity 2d ontriggerenter2d same parameter error

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

public class FieldOfView : MonoBehaviour
{
    public GameObject Player, Enemy, MainCamera;
    public Animator FOVAnimator, PlayerAnimator, EnemyAnimator;
    void OnTriggerEnter2D (Collider2D veri) {
        if(veri.gameObject.tag == "FieldOfView") {
            MainCamera.GetComponent<AnimationControl>().EnAttackAnim(true);
        }
    }
    void OnTriggerExit2D (Collider2D veri){
        if(veri.gameobject.tag == "FieldOfView") {
            MainCamera.GetComponent<AnimationControl>().EnAttackAnim(false);
        }
    }
    void OnTriggerEnter2D (Collider2D veri){
        if(veri.gameobject.tag == "FieldOfView") {
            MainCamera.GetComponent<AnimationControl>().PlBustedAnim(true);
        }
    }
    void OnTriggerExit2D (Collider2D veri){
        if(veri.gameobject.tag == "FieldOfView") {
            MainCamera.GetComponent<AnimationControl>().PlBustedAnim(false);
        }
    }
    void Start() {
        FOVAnimator = GetComponent<Animator>();
        PlayerAnimator = Player.GetComponent<Animator>();
        EnemyAnimator = Enemy.GetComponent<Animator>();
    }
    void Update() {

    }

}