You have deleted the outer scrub boundary
https://overpass-api.de/achavi/?changeset=162763421 leaving two inners that osmi spotted
https://tools.geofabrik.de/osmi/?view=areas&lon=145.31352&lat=-37.91011&zoom=17
As the boundary was the 16th version it would be better to revert that part of the changeset.
I can try if you are unsure how to do it using Josm.