I have three albums by Jack Singer. They are in ~/Music/iTunes/iTunes Music/Jack Singer/SongName.
I also have one album by Jack Singer and his band. Those files are in ~/Music/iTunes/iTunes Music/Jack Singer and his band/SongName
I choose to ignore the distinction and rename the artist of the latter to become just Jack Singer. iTunes does not move the files. They remain where they are. Presumably this is done to avoid unnecessary Time Machine changes. But I would like to move the files to their canonical location before launching my first Time Machine backup after adding the new album.
How do I tell iTunes to move the files to ~/Music/iTunes/iTunes Music/Jack Singer/SongName, mirroring the name of the artist in the tag?