Message Title

An example from migrating from H5 to H6 for Keycloak. This happens with Hibernate 6.2.CR4, and used to work with Hibernate 5:
java.lang.UnsupportedOperationException: compare() not implemented for EntityType

    at org.hibernate.type.EntityType.compare(EntityType.java:255)
    at org.hibernate.type.ComponentType.compare(ComponentType.java:215)
    at org.hibernate.type.Type.compare(Type.java:222)
    at org.hibernate.action.internal.EntityAction.compareTo(EntityAction.java:160)
    at org.hibernate.action.internal.EntityAction.compareTo(EntityAction.java:28)
    at org.hibernate.engine.spi.ExecutableList.add(ExecutableList.java:225)
    at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:311)
    at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:353)
    at org.hibernate.event.internal.DefaultFlushEntityEventListener.scheduleUpdate(DefaultFlushEntityEventListener.java:252)
    at org.hibernate.event.internal.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:143)
    at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:127)
    at org.hibernate.event.internal.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:221)
    at org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:90)
    at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:38)
    at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:127)
    at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1412)
    at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1398)
    at org.hibernate.bugs.ORMUnitTestCase.hhh123Test(ORMUnitTestCase.java:115)