Registry v5v4.09.0 9 is a placeholder for a transitional release, introducing breaking changes in preparation for the significant rewrite scheduled for v6.0.0. These changes generally involve the removal of deprecated features in order to allow new configurations to be tested prior to v6v5.0.0.
Enrollment Flow Identifier Collection
As part of the transition to Registry v6.0.0, support for legacy configurations for collecting external identifiers is being removed. See Migrating to EnvSource to for more information.