Board Thread:General Discussion/@comment-32616717-20180421171154/@comment-32271305-20180421191132

If the card is identical, you don't need to Z-Awaken the training partners and/or dupes.

Vegeta is only an SR, so in his case you do need to have one copy at SA10, get it to UR, and then feed it four Dokkan Awakened dupes. But you won't need to Z-Awaken them to UR, SSR will be enough. Only the card with the Hidden Potential activated needs to be UR.