A series episode and a video film must be combined

Hi, series episode https://www.imdb.com/de/title/tt36670539/reference/?ref_=ttep_ep_11 and video movie https://www.imdb.com/de/title/tt5594234/reference/?ref_=fn_all_ttl_8 are the same. They would have to be brought together to one item. Unfortunately, IMDb doesn't seem to have a consistent policy regarding the presentation of anime OVAs, which, as the name suggests, are ultimately productions for video release, but of course also have a direct connection to the series. However, it would make sense if IMDb followed its otherwise strict policy here as well and listed them as a standalone work under Video, at least I think so.