In Aeon 5.0, the ID field is required for Registration in the Web Validation table in the customization manager. The ID field is not present on the NewUserRegistration.html or NewAuthRegistration.html pages, though. When someone creates a user account, they get a validation error that ID is missing. The rule should be removed so as not to cause confusion for new Aeon sites. Also, many sites do not collect ID information on the registration web page.