Unity DrawLine multi (いったん描画したら機能停止させる)

DrawLineManager.cs

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

public class DrawLineManager : MonoBehaviour
{
    [field: SerializeField]
    public GameObject prefabDrawLine { get; private set; }

    [field: SerializeField]
    public GameObject currentDrawLine { get; private set; }


    void Start() {
        this.currentDrawLine = Instantiate(this.prefabDrawLine, this.transform);
    }

    void Update()
    {
        if (Input.GetMouseButtonUp(0)) {
            //描画機能停止
            if (this.currentDrawLine != null) {
                this.currentDrawLine.GetComponent<DrawLine>().enabled = false;
            }

            this.currentDrawLine = Instantiate(this.prefabDrawLine, this.transform);
        }
    }
}