Вылетает Ошибка №1010

[Universe]

Не могу понять, почему removeChild выдаёт эту ошибку

var bullet_mc:Bullet;
 
var debries:Array = new Array();
var debrieNum:uint = 0;
var speed:uint = 10;
var debriesTimer:Timer = new Timer(60);
stage.addEventListener(MouseEvent.MOUSE_DOWN, debriesOn)
 
function debriesOn(e:Event):void
{
	debriesTimer.addEventListener(TimerEvent.TIMER, trailFunc);
	debriesTimer.start();
	stage.addEventListener(MouseEvent.MOUSE_UP, debriesOff);
}
 
function debriesClear():void
{
	for(var i:int=debries.length - 1; i>=0 ; i--)
	{
 
			trace(debries[i]);
			removeChild(debries[i]);
			debries.splice(0,1);
			debriesTimer.stop();
			debriesTimer.removeEventListener(TimerEvent.TIMER, trailFunc);
	}
}
function debriesOff(e:Event):void
{
	debriesClear();
 
}
 
function trailFunc(e:Event):void
{
	bullet_mc = new Bullet();
	addChild(bullet_mc);
	bullet_mc.name = "debrie" + debrieNum;
	if(debrieNum <= 25)
	{
		bullet_mc.x = mouseX + Math.random()*(10 + debrieNum);
		bullet_mc.y = mouseY + Math.random()*(10 + debrieNum);
	}
	else
	{
		bullet_mc.x = mouseX + Math.random()*10;
		bullet_mc.y = mouseY + Math.random()*10;
	}
	debrieNum ++;
	debries.push(bullet_mc);
	//trace(trailNum);
 
	//debriesClear();
 
}

Упс...извиняюсь,в названии не тот код ошибки указал! Ошибка № 2025 - The supplied DisplayObject must be a child of the caller.
at flash.display:isplayObjectContainer/removeChild()