UpdateAsync Callbacks cannot yield?

I can't figure out where it is yielding causing the "Callbacks cannot yield" error

DataStore:UpdateAsync(tostring(DateInfo.Date()), function(oldTable)
	if oldTable then
		local newTable = oldTable
		local str = "User ["..Sender.Name.."] Command ["..c.."] ".."Players present ["..Playerz.."]"
		table.insert(newTable, str)
		return newTable
	else
		local newTable = {}
		local str = "User ["..Sender.Name.."] Command ["..c.."] ".."Players present ["..Playerz.."]"
		table.insert(newTable, str)	
		DataStore:SetAsync(tostring(DateInfo.Date()), newTable)				
	end
end)