Ошибка 'Vector2' is an ambiguous reference between 'UnityEngine.Vector2' and 'System.Numerics.Vector2'

Assets/Scripts/New_wall.cs(10,5): error CS0104: 'Vector2' is an ambiguous reference between 'UnityEngine.Vector2' and 'System.Numerics.Vector2' помогите

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


public class New_wall : MonoBehaviour
{
    public float speed = 8f;
    Vector2 direction;
    Rigidbody2D rigidbody;
    // Start is called before the first frame update
    void Start()
    {
        rigidbody = GetComponent<Rigidbody2D>();
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetKey(KeyCode.W) || Input.GetKey(KeyCode.UpArrow))
        {
            direction = Vector2.up;
        }
        else if (Input.GetKey(KeyCode.S) || Input.GetKey(KeyCode.DownArrow))
        {
            direction = Vector2.down;
        }
        else
        {
            direction = Vector2.zero;
        }
        if (direction.x * direction.x + direction.y * direction.y != 0)
        {
            rigidbody.AddForce(direction * speed);
        }
    }
}