When searching Hataraki Man finds themoviedb.org/tv/115109 but when viewed is not marked in trakt.tv/shows/hataraki-man
The TMDB ID on Trakt is different (see the TMDB link in the bottom left).
It actually links to https://trakt.tv/shows/hataraki-man-2006.
If that doesn’t look right, you can ask at https://support.trakt.tv/ for the people at Trakt to fix this.
Sorry , I did not describe the problem that way . When marking a series as " viewed " , the seriesguide writes " it is not possible to synchronize with trakt " . The problem is with trakt , there are two series: /shows/hataraki-man and /shows/hataraki-man-2006 . Yesterday , another problem was discovered, two variants of one and the same series: /shows/fantasy-patrol and /shows/fantasy-patrol-2016 .