The registration process is saved in a registration session in the database. All information about a registrant and their choices in the registration process are saved within this session. This registration session is saved in the system for 24 hours by default. This saves the progress and choices of a client for 24 hours. If a registrant returns to their registration process within that 24 hours their data and choices will be saved for them. They will continue their registration from the point they left off.

So if you have not launched your site yet and are testing the registration code feature or creating your own registration code form you must clear the current registration session between tests of this feature.

So if the client wants to restart their registration process they will need to wait 24 hours for the old session to expire from the system or simply click the "end registration" link at the bottom of the registration process pages. So if you have a "user group choice screen page" at the front of your registration process the client will need to restart their registration session to change their user group selection.