Kajona

/system/config/modul_votings_id.php

In total, the file consists of only a single line of code:

define( "_votings_modul_id_", 501);

Every module within a Kajona-installation is represented by a module-id. This id is unique and must be defined before installing the module since the id is used within the database, too.
The common Kajona-modules use ids between 0 and 500 in most cases, so it's safe to use an id >500 for your own module.