Perhaps there is nothing to do? There are two options on that panel. The first is only enabled if the library is in the older layout that put artist folders directly inside the media folder instead of a Music subfolder. Once that option has been applied it becomes disabled. The other, for consolidating files, is always enabled even when all files are consolidated, and is expected to be unticked when you reopen that menu option.
See Unconsolidated for a script that makes a playlist of any unconsolidated tracks, though if you didn't get an error message saying there were files that could not be consolidate then you shouldn't have anything to worry about.
tt2