Update genre-dependent directory after updating genre?

Files are imported to the beets database using beet imp foo.mp3. In my case, this triggers the LastGenre plugin to apply genre tags automatically. The imported files are stored in a directory structure based on the aforementioned genre tags (eng/rock/artist/album/foo.mp3)

If the genre tags are inaccurate, they can be corrected using beet modify "foo" genre="bar", but how do I tell beets to also update the underlying directory structure?

You’ll want to use the -a flag to the modify command. This thread has more context: