There is a sprint that no longer exists but it is showing up in the Sprint field when I edit a ticket. I checked all of our boards and only two are scrum based. Only one has a sprint, and it only has one. Yet, two sprints are showing up to be selected in the Sprint field.
The name of the "ghost" sprint relates to project that was deleted.
We re-indexed and it solved this issue for another ghost sprint, but not this one.