Hi,
as of 1 January 2024, DB Netz AG and DB Station&Service AG will merge and renamed to DB InfraGO AG. This requires an update to lots of operator=* tags including operator:wikidata=*, and some owner=* tags. The mechanical edit will also remove existing operator:wikipedia=* from the modified objects.
The mechanical edit affects mainly Germany, but some infrastructure is located in Switzerland, Belgium and Czech Republic.
You can find the documentation on the wiki.
Best regards
Michael