Why does this door lose the click detector if there is not key held?

I am trying to get the door to stay closed if you don't have a key and show a message that you need a key to unlock it. When the key is picked up you are then able to open it. The key works just fine on the door, but when you don't have a key and click the door, The click detector is destroyed and the sound plays which is what I don't want to happen, the door stays closed though, which is what I want it to do.

local door = script.Parent
local click = door.ClickDetector
local value = game.Workspace.Key.Value
local hidden = game.Workspace.door1

local function onClick(Clicked)
    if value.Value == true then
        door.Position = Vector3.new(33.9, 65.3, 7.6)
        script.Music:play()
        wait(0.33)
        script.Music:Stop()
        click:Destroy()
        wait(1)
        hidden:Destroy()
else
    if value.Value == false then
    local scrgui1
    if not Clicked.PlayerGui:FindFirstChild('ScreenGui') then
        scrgui1 = Instance.new("ScreenGui", Clicked.PlayerGui)
    else 
        scrgui1 = Clicked.PlayerGui.ScreenGui
    end
    local alert = Instance.new("TextLabel",scrgui1)
    alert.Text = "You need a key to unlock this."
    alert.Position = UDim2.new(0.5,0,0.7,0)
    alert.TextStrokeColor3 = Color3.new(0,0,0)
    alert.TextStrokeTransparency = 0
    alert.TextColor3 = Color3.new(255,255,255)
    alert.FontSize = Enum.FontSize.Size18
    script.Music:play()
    wait(0.4)
    script.Music:stop()
    click:Destroy()
    wait(2)
    scrgui1:Destroy()
    alert:Destroy()
        end
    end
end

click.MouseClick:connect(onClick)