Cloned map falls apart?

I tried to make a random map chooser. It works, but I need my map destructible, so I unanchored the map. However, it falls apart. I even included clone:MakeJoints() What was so wrong?

local function changeMap()
    local maps = game.ServerStorage.Maps:GetChildren()
    local map = maps[math.random(1,#maps)]
    local clone = map:Clone()
    clone.Parent = game.Workspace.GameMap
    clone:MakeJoints()
end

My map also has folders and models inside the cloned map. All the parts in there have welds, studs, and inlets.