Hi @zoecccp
Thank you for posting your question in the community!
When making changes to an existing flow, I don’t think you need to start from scratch, but I would recommend cloning the message and making the changes to the new version.
First, this allows you to keep your existing message active while you work on implementing the changes.
Second (and in my opinion, the most important), cloning allows you to retain performance metrics for the old creative so once you launch your new message, you retain all of the preview data with a clean view to see how your new changes are driving performance.
Unless you are planning to make structural changes to the trigger or logic of how users progress through the flow, I’d simply clone and proceed from there!
I hope this helps! Please let me know if you have any other questions.
@In the Inbox