This method was requiring a person_id to be set, which was\
not the case here so it threw an error. Using the method\
already available in CRUDController works fine, seems to be\
no need to override it.
Replaced most of the invocations of getDoctrine()->getManager() with ManagerRegistry->getManager(), and added ManagerRegistry injection to controllers where needed. This is part of an ongoing effort to improve code clarity, and avoid unnecessary method chaining in various parts of the codebase.