Hi, I am trying to update tickets (in particular, Labels field) according to what is described here: https://confluence.atlassian.com/adminjiracloud/importing-data-from-csv-776636762.html (Updating existing issues).
Therefore, since CSV records have Issue Key to match the issue to be updated, when asked how to map all fields, I would expect to have Issue Key listed among possible choices.
However, I cannot find this fields as possible mapping, and leaving it as "Do not map" causes the CSV issue key to be ignored and tickets to be newly created and not updated.

Why is this happening?
Thank you.