maintenenace_regularservice_setting-php-is-not-updating-with-new-servicetypes

Hi, Maintenenace_regularservice_setting.php is not updating with new servicetypes, so the list for regular maintenance is always empty when you add a new entry. as i am not a professional in php coding i need a little help solving this. I build a database for our agricultural fleet with many custom services and i would realy like to have a way to edit entries in the list, rather than going into the SQL database itself.   thanks in advance Thomas