If there are errors when performing the command Check link index, a message box appears with the question, whether the Link index shall be created anew.

The Link index is part of the Display index. If the link index is faulty (recognizable by missing search results, for example), the Display index could be generated for all catalogs as well. However that would need considerably more time than only updating the Link index. This takes only a few minutes, even at a hundred catalogs.