Create Tutorial - How to fix a backend bug.

[U8NWXD]

Skills covered

Debugging backend code,
Understanding how Oppia's authorization system works,
Potentially tracing through database interactions to verify stored role information,
Writing unit tests to make sure it doesn’t happen in future.

Similar issues

Existing relevant pages

Example

Pinned Translation Opportunities remain pinned even after all available cards for a lesson have been reviewed. The lesson tile disappears from the list but reappears as pinned when a new card is added for review.

Expected Behavior: Once all available cards of a pinned lesson are reviewed, the lesson should be unpinned.

Note: No need for a git patch file as we are considering the current expected behavior as a bug.