Background: We are working with SAFe and want to use the portfolio hierarchy level extention provided by JIRA Portfolio. We want to link User Stories with an long-term Team "Epic" using the Epic Link. The "Epic" is still an container, to structure work on the team level. Using SAFe, we created a new level above the "User Story" Level for issues of the type "Feature". A Feature can be broken down in "User Stories". To aggregate all Story Points of an "User Story" issues to a "Feature" issue (done in one PI) we have to use the "Parent Link". Using parent link and epic link in an issue is not valid. An error message is shown.
How can the UseCase be implemented in JIRA Portfolio, without this option?