Qperfectionweld not working when i put a tool in the players inventory how do i fix?

so whenever i put my lightsaber in the starter pack perfection weld works perfectly but when I clone it from replicated storage then it breaks down and doesn't work here's the code I put inside the button to switch the lightsaber out and whever that happens its just the handle that appears in my hand I'm new to this platform so idk how to get the start and end of the code into the code box sry

function leftclick() local player = game.Players.LocalPlayer local inHand = player.Character:FindFirstChildOfClass('Tool')

local inBackpack = player.Backpack:FindFirstChildWhichIsA('Tool')

if inHand then

    inHand:Destroy()

end

if inBackpack then

    inBackpack:Destroy()


end

    local backpack = player:WaitForChild("Backpack")
    local cloneTool = game.ReplicatedStorage.Bluesaber:Clone()
    cloneTool.Parent = backpack

end script.Parent.MouseButton1Click:Connect(leftclick)