Information:
By default the script uses Geonames database (http://www.geonames.org/) (their most structured database) for data on cities and administrative divisions. But this database is not complete for any country. You can update this database (from your Admin panel -> International -> Countries -> [Admin. division 1] or [Cities]) by adding new entries, editing or deleting existing entries.
To mark a difference between the data imported from Geonames and your added data, the script uses a prefix for Administratives Divisions codes by default.
You can change the (new) administratives divisions prefix in the config/larapen/core.php file at line 186 like this:
/*
|----------------------------------------------------------------------
| Custom Prefix for the new locations (Administratives Divisions) Codes |----------------------------------------------------------------------
|
*/
'location_code_prefix' => 'Z',