iOS Update Preorder Version in Appstore Connect

We have version 1.0 of our app which was published for a preorder. We recently pushed some updates, created a version 2.0, and it went through review and was accepted. Now we'd like to retire the version 1.0 and use the 2.0 for the preorder. Is it possible to keep the people who have already pre-ordered the app or do we have to throw version 1.0 and re-publish a new pre-order?