How do I not spawn a coin on top of the already existing coins?

Hi

In my game loop I spawn coins to points added to my map.

for i, coin in pairs(AvailableCoinSpawnPoints) do
	if coin then
		currentRandomCoinNum = math.random(1, #AvailableCoinSpawnPoints)
		positionCoin = AvailableCoinSpawnPoints[currentRandomCoinNum]
		MyCoinTmp = ServerStorage.Coin
		MyCoin = MyCoinTmp:Clone()
		MyCoin.Parent = workspace
		MyCoin.CFrame = positionCoin.CFrame
		table.remove(AvailableCoinSpawnPoints,currentRandomCoinNum)
	end
end

This works fine the first time my game loops. When I have a winner the game quits and enters the lobby. When the game start over again the coins are spawn inside the already existing coins. And after a few rounds there are multiple coins spinning inside each other on the spawn point. I am thinking that AvailableCoinSpawnPoints would be refreshed when the map is destroyed (before the last player is sent to the lobby)?

Anyone know how I can spawn a fresh set of coins everytime a game starts?

Thanks for your answer!

Now I have created a folder in my ServerStorage named Coins. When I start up the test server I can see the folder have been filled up with my coins.

I get the folder like this:

local CoinsFolder = ServerStorage:WaitForChild("Coins")

The parent for filling up the folder is like this:

MyCoin.Parent = CoinsFolder

Since I now switched over from parent workspace to folder; the coins are not showing when I enter the map in test server. You know why this is?

Let's say that the coins are showing I thought I could add something like this at the end of the game:

for i,v in pairs(CoinsFolder:GetChildren()) do
    v:Destroy()
   print("Coin DESTROYED: "..i)
end

ClonedMap:Destroy()

(but this does not go into effect since no coin is showing on the map at the moment)

EDIT: I moved the Coins folder to workspace and now they appear in the map again and all the coins spawn just fine with no duplications.