holo error, clear not working. Am I doing something completely wrong?

So I was trying to make a holo, and the loading works. I can say "load meadows" and it would load meadows. But clearing does not work. I want to set the children of holo's parent to Lighting when I say "clear" so I put this code

player.Chatted:connect(function(msg)
            if msg == "clear" then
                for index, child in pairs(workspace.holo:GetChildren()) do
                index, child.Parent = game.Lighting
                end
end

But instead of changing the parent to Lighting, it removes it altogether so that I can't load it again. Am I doing something completely wrong?