Why does ray cast show up twice?

[AlluraBluebird]

I press left mouse button and it shows me what the raycast hit twice instead of once. How to make it show just once?

Then the script:

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

public class WorldInteraction : MonoBehaviour {

    public float maxDistance = 5f;

	void FixedUpdate () {
        if(Input.GetMouseButtonDown(0))
        {
            Ray newray = Camera.main.ScreenPointToRay(Input.mousePosition);
            RaycastHit newhit;
            Debug.DrawLine(transform.position, transform.position + Vector3.forward * maxDistance, Color.red);
            if(Physics.Raycast(newray, out newhit, maxDistance))
            {
                if (newhit.collider.gameObject.name != "Ground")
                {
                    Debug.Log("You shot a " + newhit.collider.gameObject.name);
                }
            }
        }
	}
}

[Socapex]

Try in Update()