How i get Thumbnail Camera in viewport by Insert Service?

I want this code to probably be Toolbox/Hats Thumbnail Camera. But I inserted it and then Thumbnail Camera gone in the viewport frame.

There’s my script.

local inserter = game:GetService("InsertService"):LoadAsset(2646473721)
	inserter.Name = "Obj"
	inserter.Parent = workspace
	local hat = inserter:FindFirstChildOfClass("Accessory")

	hat:FindFirstChild("Handle").Anchored = true
	hat:FindFirstChild("Handle").Position = Vector3.new(0,0,0)

	inserter.Parent = template.ViewportFrame

			local cameranew = hat:FindFirstChild("ThumbnailCamera"):Clone()
			cameranew.Parent = template.ViewportFrame
			template.ViewportFrame.CurrentCamera = cameranew