I just solved this ticket: https://issues.jboss.org/browse/ORG-1832 . The Hibernate Search is no longer twice in the project list, but I just disabled the page to be added. It is strange, that there are following pages in Magnolia:

https://www.jboss.org/hibernate/subprojects/search/search (including subpages).

It appears, that the "search" node was accidentally copied to itself, because the content of search/search appears to be the same as of search.

Can someone check it and eventually remove the search/search node, if it is just an error? Thank you.