The default precedence for plugins is 50 and the run in more or less alphabetical order (but not guaranteed). This plugin needs to run after the others have already done their work. https://fedorahosted.org/freeipa/ticket/1370
The update files are sorted before being processed because there are cases where order matters (such as getting schema added first, creating parent entries, etc). 10 - 20: Schema 20 - 30: FDS Configuration, new indices 30 - 40: Structual elements of the DIT 40 - 50: Pre-loaded data