Advice for model change in SwiftData

I have a new app launched about a month ago, <40 downloads. I'm working on an update to add a few features and make it more attractive. I didn't plan ahead and now the new features require slight model change, which I believe should render any user data obsolete and require a fresh download. My question is should I just bite the bullet given the tiny user count? Are there way to go about it that it won't invalidate current user data? Are there other options? Thanks you