Event ":Once" Being called more then once

hey im doing a inventory system with specific description of every item,
and i used the “:once” event and it works fine when i click 1 item
but when i click 2 it runs the event twice.

local function Open(child,status: "fast" | "slow")
	ItemSelected = child.Name
	local tween = tweenservice:Create(frame,TweenInfo.new(TweenTime,Enum.EasingStyle.Quad,Enum.EasingDirection.InOut),{Position = Positions.framePositionNew})
	

	
	Item.ItemBio.Text = bios[ItemSelected]
	Item.ItemName.Text = ItemSelected
	Item.ItemType.Text = "Item Type: "..types[ItemSelected]



	if types[ItemSelected] == "Equipible" then
		Item["Un/Equip"].AutoButtonColor = true
		if player.Backpack:FindFirstChild(ItemSelected) then -- if the item is found
			Item["Un/Equip"].Text = "UnEquip"
			statusItem("Red")
		else
			Item["Un/Equip"].Text = "Equip"
			statusItem("Green")
		end

		Item["Un/Equip"].MouseButton1Click:Once(function() --HERE
			if player.Backpack:FindFirstChild(ItemSelected) then
				print(ItemSelected.." 1")
				player.Backpack:FindFirstChild(ItemSelected):Destroy()
			else
				print(ItemSelected.." 2")
				rep.Tools:FindFirstChild(ItemSelected):Clone().Parent = player.Backpack
			end
			print(3)
			task.wait(0.1)
			Close(child)
		end)


	else
		Item["Un/Equip"].Text = "UnEquipible"
		Item["Un/Equip"].AutoButtonColor = false
		statusItem("Red")
	end
	opened = true
	if status == "fast" then
		StopViewPortFrame()
		if frame.Visible == true then
			rep.Models:FindFirstChild(ItemSelected).PrimaryPart:Clone().Parent = Item:FindFirstChild("ViewPortFrame")
		end
		Item.Visible = true
	else
		cd = true
		tween:Play()
		task.delay(TweenTime,function()
			if ItemSelected ~= nil and opened == true then
				StopViewPortFrame()
				if frame.Visible == true then
					rep.Models:FindFirstChild(ItemSelected).PrimaryPart:Clone().Parent = Item:FindFirstChild("ViewPortFrame")
				end
				Item.Visible = true
				task.wait(0.2)
				cd = false
			end
		end)
	end 
end

Fixed it by seperating the click event from the function.