I'm trying to create a new workflow for my Epics. My goal was to create a more simple set of statuses for Epics (Backlog, In Progress, Done) rather than moving them through the various development statuses (QA, UAT, Selected for Dev, etc). I have a separate workflow created for my stories, tasks, bugs, and subtasks.

When I go to publish my Epic workflow it asks me to convert the statuses of my existing tickets. This worries me because I don't have any Epics in the status of "Code Review", "UAT", "Selected For Development", "Kickback". Is it going to convert the subtasks associated with the Epic? 
Also, any other ideas for a simple way to manage Epic status as their linked issues move through different cycles are welcome.