If you are running a 4.7.1 or 4.7.2 instance of Fedora that had been upgraded from a previous version (4.7.0 or earlier), and you do not believe it has ever been shut down since upgrading to 4.7.1 or 4.7.2,  you MUST make a backup via fcr:backup immediately.  To recover from this bug, take a backup (which will be corrupted in a particular way), fix the backup, and restore into an instance of 4.7.3.  All users should take a backup of their Fedora instance before upgrading to 4.7.3 just to be safe.