Andross1989

Is there any way to force metadata to be updated for platforms only? I used the mame custom xml importer to separate my naomi/naomi 2/atomiswave roms, and scraped them as "Arcade", as advised in the xml importer instructions, however then these three systems were scraped as arcade - showing the arcade description of "Beginning with spacewar!..." I've deleted this metadata, and changed them to be scraped as their independent platforms, however the games are all good - the platform is not. Is it a case of copying and pasting information out of the platform database?