Why my check if available click is more than 0 not work? I got -1

I just try if Click Available is more than 0 , it will add 1 score. It should be 0 but I got -1.

Here is button script.

script.Parent.MouseButton1Click:Connect(function()
    if script.Parent.Parent.TextLabel.Value.Value >0 then
        script.Parent.Parent.TextLabel.Value.Value = script.Parent.Parent.TextLabel.Value.Value - 1
    end
end)

And here is script that set text to click available

while true do
    script.Parent.Text = "Click available: "..script.Parent.Value.Value
wait()
end

I have a NumberValue in TextLabel. Its name is "Value"