User blog comment:Otakon7/Otakon7's Buddyfight Simulator/@comment-2234004-20160325114807

Note, I will be using a new ID system in v2, which means all of your current decks will be deleted.

Reason being because cards are added alphabetically, which changes a card ID if a card is added before another which had it's ID defined in a prior update, now I will be using the wikia ID, which will change only if a card page is deleted (could be it changes via rename, but either way, once an EN release is there, it should stick)

Changes will be made within 24 hours.