We have a number of issues that were addressed in a previous sprint, but the sprint was closed without moving them to the done column, so they are showing up in our new sprint. They've been moved to done, but this is not correct ( as they are not completed in this sprint, but in our previous one ).
We want to be able to go back and mark these tasks as completed in the previous sprint, but I do not see how to do this.
Can you please advise how I can do this?