Moving EPICS to new Project Instance in JIRA v7.2.9. Having issues moving EPICS with sub-stories. We have 150+ EPICS (and growing) which remain open (perpetual) as they are mapped (1:1) to accounts where all the DEV work and support requests are nested (aggregated under the EPIC id, per account/customer). So the EPIC remains open as long as the customer account is open - but the sub-stories/tasks/defects are opened/closed. Any best practices/guidance?