The repair by Microsoft might also help those who received an even rarer error message, 80188306, update their phones. So far, most of the fixes are taking place on Nokia Lumia 925 units that have already received the Lumia Cyan update.
Microsoft's Joe Belfiore has sent out a tweet, blaming a "packaging problem" for the error. He is telling those affected by the 8018830f message to try the update again, as it should now work.
Error code 80188306 prevents the installation of Windows Phone 8.1 Update 1
source: @joebelfiore via WPCentral