Guide

1. Select the project for which you want to change the key.

2. Once in the project, click on 'Project settings' in the left-hand menu.

3. In the 'Details' page, you'll see the 'Project Key' field.

4. Edit the 'Project Key' field to the new desired key.

5. Click 'Save' to confirm changes.

6. This change can only be done if you're a Jira admin or have the necessary permissions, and it cannot be undone easily. Make sure the new project key is what you want before saving the changes.