I want my item to respawn when the timer reaches 0 but it gives me this error?

I'm making a game with keys, I have a little timer and when it reaches zero, the key is supposed to respawn, but when I play test, it gives me this error...

"YellowSpawn is not a valid member of workspace" -- yellow spawn is the key spawn

Here is my script:

game.ReplicatedStorage.Values.Seconds.Changed:Connect(function()
    if game.ReplicatedStorage.Values.Seconds.Value == 0 then
        wait(1)
        game.ReplicatedStorage.Values.Seconds.Value = 6
        workspace.YellowKey.Handle.Position = workspace.YellowSpawn.Position -- This is the part
    end
end)

Thank you if you can help!