Tree Turns Bright Pink???

I have a script and it works great! Except for when the tree respawns, it turns to a bright pink: Here’s a few screen shots:

Pink Tree:
Imgur

TreeRespawn Script:

Note: Because Imgur is stupid and won’t let me post a photo within an hour of eachother, so i’ll paste in the script:

using UnityEngine;
using System.Collections;

public class RespawnTree : MonoBehaviour {

public float Timer; // Time before being respawn
public GameObject HealthyTree;

void Start () {

}

// Update is called once per frame
void Update () {
	if(Timer > 0)
	{
		Timer -= Time.deltaTime;
	}
	if(Timer <=0)
	{
		Timer =0;
		Destroy(gameObject);
		Instantiate(HealthyTree,transform.position,transform.rotation);
	}
}

}

Thanks for helping!

Magenta is a problem with the material/shader assigned to the tree.