osm.org/way/394919910/history has KN = 61:26:0170501

What is the meaning of this unusual key? Is this tag needed?
Or maybe can it be expressed in a more typical way that would be easier to understand?
Or maybe this key can and should be documented as useful tagging schema?

osm.org/node/1493266936 - wikidata links https://tr.wikipedia.org/wiki/Seyyid_Ali_Baba,_Narman which seems to mismatch

wikipedia links nonexisting page

what is going on?

osm.org/node/9681169835/history

is it really amenity=bank and shop=greengrocer at the same time?

osm.org/way/395889438/history has KN = 61:01:0150201

What is the meaning of this unusual key? Is this tag needed?
Or maybe can it be expressed in a more typical way that would be easier to understand?
Or maybe this key can and should be documented as useful tagging schema?

osm.org/way/395889429/history has KN = 61:01:0010501

What is the meaning of this unusual key? Is this tag needed?
Or maybe can it be expressed in a more typical way that would be easier to understand?
Or maybe this key can and should be documented as useful tagging schema?

osm.org/node/4950379415/history

disused:amenity=pharmacy and healthcare=pharmacy are in conflict, one claims that pharmacy existed and another claims it exists
Is this pharmacy existing or not?

osm.org/node/3785189375/history

Is it gate or stile?

Is there really a stile here? If yes, then barrier=stile is missing.
If no then stile= for stile subtype makes little sense.

see osm.wiki/w/index.php?title=Tag:barrier=stile#Stile_types

http://overpass-turbo.eu/s/1c3g finds about 300 other similar issues. See also https://github.com/openstreetmap/id-tagging-schema/pull/1624 proposing to eliminate one of root causes.