My "Postion Updater" doesn't work?

So, I made this and.... I tryed looking on the wiki about this stuff and still couldn't fix this please help me?

wait(0.1)

function Update()
    local children = game.Players:GetChildren()
    local PlayerName = script.Parent.Parent.Name
    for i = 1, #children do
        local plr = (i, children[i].PlayerGui.Players:WaitForChild(PlayerName))
        plr.Position = script.Parent.Position
    end
end

script.Parent.Changed:connect(Update)

The output also said: 20:49:40.351 - Workspace.Players.Player.PlayerPosition.PositionUpdater:9: attempt to index local 'plr' (a number value)