Uh...I think it's a really difficult matter. Personally, I'm a bit less for omitting the hyphens after I realize one can argue that we should have to repeat a number after the tilde for some stems like LC because Konami does so on both
official site and
obi, and that may go over the limit of inconsistency a database can allow... Then again, if we go for consistency, it means we should unify the catalog numbers and start to correct all the albums that still lacks hyphens.