Cannot install both KJVA and KJV

When both KJV and KJVA are installed only the KJV is available in Books.installed().

This is because each book is checked to see it is not already in the list in SwordBookDriver:
// Only take the first "installation" of the Book
Book book = createBook(sbmd);
if (!valid.contains(book)) {
valid.add(book);

but contains(book) eventually compares AbstractBookMetaData for the books where the descriptions are compared, but are the same:
return getBookCategory().equals(that.getBookCategory()) && getName().equals(that.getName());

Should we be comparing module name instead of module description? But I would have also thought the KJVA would have a different description to KJV.