...
You can only edit the first line, but the others lines are live-updated. Requirement Yogi only shows a few requirements to keep the wizard clear, and adds a line indicating "..." if you have a lot of requirements. Don't worry, they'll be renamed as well.
Renaming Task Status
Once you've changed your requirements' key, click on rename to start the renaming task. You'll be redirected to a new page, which show you detailed informations about the task.
Please note that this task can take a while if you rename many requirements, so be patient. The progress bar is updated frequently and automatically to inform you about the progress of the task, as well as the status under this progress bar. Please also note that the "Time remaining" is only an estimation and can be inaccurate.
Once it's done, a button named "Acknowledge" appears. Click on it to be redirect to the Requirement Yogi Search screen. This is the recommended way, rather than using the menu bar, as this also tells Confluence to stop tracking the task.