[IPT] strange meta.xml file

Hi everyone, I'm using IPT Version 2.1.1-r4640 with several extensions and I am wondering why my meta.xml looks different from others. Usually for the extensions there is just a row <coreid index="0"> But in my meta.xml there is a second one <field term="http://rs.tdwg.org/dwc/terms/occurenceID"> I've attached both meta.xml-files (taken from a GBIF provider). HIT seems to have some problems with it, so do you have any idea why my meta.xml looks like this? Best, Gabi