I just wrapped up a sprint. There were a few dozen "done" tickets. When I ended that sprint (and migrated all open issues to the new sprint), the "done" tickets ALSO appeared on the new sprint board. Why is that? Can I clear these done tickets?
For example, "Ticket A" was completed in "Sprint 1" while "Ticket B" was not. I closed "Sprint 1" and told JIRA to put "Ticket B" in "Sprint 2". When I closed "Sprint 1" however, "Ticket A" (which was done), appeared as Done in "Sprint 2".
When I click on the ticket, I cannot remove the sprint either. Instead I see Sprint: "Sprint 2" with a +1 saying this was completed in another sprint?