@jmarchon There is no such thing as a "standard tag" - only frequently used ones.  Please read https://wiki.openstreetmap.org/wiki/Any_tags_you_like .  In particular, changing a detailed tag to a less descriptive one without preserving that detail devalues the hard work of actual mappers and devalues the data in OSM.
If a data consumer wants to process "mushroom)farm" as "farm_auxiliary" it is trivial to do that when they process OSM data.
Fixing an obvious misspelling (perhaps "farm_auxiiary") to an expected value would make perfect sense, but that is not what you have done here.
