Merged artist not being redirected to target artist

I merged two artists in http://musicbrainz.org/edit/14469072

However the old MBID is not redirecting to new one:
merged artist : http://musicbrainz.org/artist/5d8b6fe0-2b1b-422f-b033-2cecd3bed7ac (pre-NGS: http://classic.musicbrainz.org/artist/5d8b6fe0-2b1b-422f-b033-2cecd3bed7ac.html)
target artist : http://musicbrainz.org/artist/4f6654b3-0ae3-44bc-9bed-e9477446beab