In the process of trying to figure out why that larger area was a multipolygon in the first place, I was getting ominous timeout errors trying to view the history on this site, so I looked it up on PeWu... and instantly regretted it: https://pewu.github.io/osm-history/#/way/227263491

Seems nobody's really sure if it's supposed to describe the foliage (forest or scrub?!) or some topo region or what... might need to come back to this one with a fresh brain. In any case, since I'm not sure even the first relation was actually needed, we can probably nuke the new one from orbit before it adds to the can of worms (unless you need it for what you're doing down there).

My thought would be to eventually expand the old one to include the area north of La Tuna canyon, to compose "Verdugo Mountains"? It's just kind of painful (if not impossible) to work with big relations in iD; I don't even like dealing with building-sized multipolygons if I can help it. :/
