Why does cloning the model break the script?

This script is within a part within a model. The problem is that when you go on test mode and have a script clone the model this script no longer works and only works in the first original model. It also doesn't work if I select it with the roblox select tool while in test mode and clone it. What is the issue?

--give cookie tray (put in inven, remove cookie tray, turn off oven
	script.Parent.ClickDetector.MouseClick:Connect(function(player)
		local foodinventory = player:FindFirstChild("BakedGoods")
		if foodinventory ~= nil then
			print("yes")
		local alreadyexists = foodinventory:FindFirstChild("ChocChipCookies")
		if alreadyexists == nil then
			print("yeet")
			local tag = Instance.new("NumberValue",foodinventory)
			tag.Name = "ChocChipCookies"
			tag.Value = tag.Value + 12		
		else 
			print("yoot")
			alreadyexists.Value = alreadyexists.Value + 12  --instead of making a new value, adds 12 to existing inventory value
			end	
		end
		
		workspace.Oven1.On.Value = false --turn off oven (will make oven w/player id tag attached later)
		script.Parent.Parent:Destroy()
		
	end)