Working on a free Jira Cloud instance with one productive project und two test projects.
Yesterday I played around in one of the test projects and created a sprint 17 and two boards and more status and so on - in the end I "Completed Sprint 17" there.
Today the sprint 17 in our productive project is gone. No hint that it ever existed.
The productive stories, tasks and bugs have an entry in field "Sprint", that points to the sprint 17 of the test project!!!
How can this be and how can it be repaired?
Could someone have an eye on that