You made some changes to the green at https://www.openstreetmap.org/way/685037079. It used to be a multipolygon with a fringe defined by the outer way/fringe and the green. But somehow the fairway was deleted and the relation between the two is "broken". Not sure what the purpose of the change was. Sometimes you see people deleting a feature entirely and then re-adding it from scratch and wind up with this situation, but that doesn't appear to be the case here. 

I'm starting to write a wiki article about how to handle multipolygon relations and golf course mapping, but it doesn't directly match this case, but maybe you'll find it useful how to deal with relations in iD (which can be confusing).

https://wiki.openstreetmap.org/wiki/ID_understanding_golf_course_relations

