Halllo @Mateusz_Konieczny,
I will try, and hope that the meaning is not lost in translation 
As an outcome I see so far:
- the tag “museum=apis_mellifera” is not very well chosen, but it could be that it is important for some people
- it is better to discuss this on an international level
That’s why I created the second topic in English (for the first time, I don’t know the procedures well yet)
Part of my reasoning was:
There are good possibilities via subject=* to specify the general tags at museum=*. Therefore, in my opinion, care should be taken not to use very specific subtopics (and I see apis_mellifera as such) in the main tag.
There has not yet been a clear tendency in the discussion on this point.
There could be a misunderstanding: I don’t want to abolish the tag apis_mellifera, I just don’t want to recommend its use with the key:museum in the wiki, so that the tagging of museums is structured more systematically.
Thank you for your interest
HAmap
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(edit: translation completed)