Hello Harel! 

Oddly, this changeset added "כלניות במנחת מגידו" to the Megiddo airport. 

Looking at the history, the problem began with
https://www.openstreetmap.org/changeset/65714159 , where an IHM user added a natural=flower on top of the Megido airport node. Over time this triggered a series of bulk edits on the airport node including this edit. The node is here: https://www.openstreetmap.org/node/408501605

Is allowing a user to add natural=flower on an existing airport an intended behavior?