Sprint shows up as Future sprint, although it was closed ( or How to close a sprint via SQL?)

[Deleted user]

When I go to Sprint field in a ticket and start entering a sprint name. I see a previous sprint (that was closed) show as FUTURE SPRINT. 

The issue maybe resulting that I had another scrum board and created a sprint with this exact name. Then I deleted the scrum board. 

Anyone know how I can fix that? How can I delete this sprint name again?

[Deleted user]

From what I gathered so far this is basically an orphaned Sprint. The board associated with it was deleted but the Sprint was not deleted/closed (as it should have)

Now the question is how do I close or rename this sprint? I assume it can only be done via SQL.

I need some help on how to look up this sprint and change it via SQL. 

THanks