Using a hosted next-gen Jira on atlassian.com I clicked the "Complete sprint" button and then started a new sprint. I was surprised to see all the stories that we had completed in the previous sprint appear in the new sprint in the "Done" column. I checked the burnup report for the previous sprint and it shows that we only completed two stories.
How do I move all these completed stories to the previous (now closed) sprint so that they show up correctly on the burnup report?
This is the first time we've had this problem. We're currently on sprint 5. The first three sprints worked fine.