I have a team-managed project. Due to an error in a workflow, when closing a sprint, all the issues were moved to another sprint adn the sprint was closed empty. The workflow issue was corrected and then the new sprint that had all the issues was closed. The problem is that those issues, now have stored 2 sprints (with the same name). How can i delete one of those sprints so reports on completed issues are not broken? (Information is exported and consumed by a system that only accepts one sprint per issue).