How to save/load models with DataStore properly?

I am trying to clone the models within a Master model (CookieSheets) that has an assigned base for a unique player. The code keeps failing at line 13. I can't seem to figure it out.

Here is the error: GetPrimaryPartCFrame is not a valid member of ObjectValue

local DSa = game:GetService('DataStoreService')

game.Players.PlayerAdded:connect(function(player)
	wait(0.2)
	local key = "user_" .. player.UserId
	local DS = DSa:GetDataStore(tostring(key))
	local stable = {};
	print("Yesssss!2")
	local char = player.Character
	local list = game.Workspace.CookieSheets["CookieSheet"..player.Name]:GetChildren()
	print("Found!2")
	for i=1,#list do
		stable[i] = {list[i].Name,{list[i]:GetPrimaryPartCFrame():components()}};
	end;
	DS:SetAsync('Build', stable);	
end)

game.Players.PlayerRemoving:connect(function(player)
	local key = "user_" .. player.userId
	local DS = DSa:GetDataStore(tostring(key))
	local stable = DS:GetAsync('Build')
	local ModelsContainer = Instance.new("Folder",player)
	ModelsContainer.Name = "ModelHolder"
	for i=1,#stable do
		local nm = ModelsContainer[stable[i][1]]:Clone();
	nm.Parent = workspace;
	nm.CFrame = CFrame.new(unpack(stable[i][2]))
	end;
end)