Once a registration has been submitted, only the Event Director can update the information.
When you register a Team to an event, at the time you choose to register a Team, the Team information and details listed/associated with the Team (i.e. Team Name/Age/Competitive Level) will remain as currently listed at the time of the registration, and will in fact be how the Team's information will appear for the Registration/Application to the event.
As a result, the Team details related to the event registration information will not change and/or will not be affected by any changes made to the Team within your Club Management after the registration has been submitted to an event. If any changes/edits need to be altered, you will need to reach out to the respective event to assist with managing the registration details for you and making any changes/edits accordingly.