You can update any details for your Smart 1:1 (besides the attendee) and it will take effect for all upcoming 1:1 events. If you want to learn more about which fields you can edit and change within a Smart 1:1, check this article out.
How to edit a Smart 1:1
Navigate to your Smart 1:1s page in Reclaim.
Click on the Smart 1:1 card to open the details view.
Click the pencil icon labeled Edit.
Edit any details you would like to change for the Smart 1:1.