HHH-18032 CompositeId, when the id assigned by PrePersist method an HibernateException: identifier of an instance of _ was altered is thrown

Author: dreab8

hibernate-core/src/main/java/org/hibernate/event/internal/AbstractSaveEventListener.java

@@ -26,6 +26,7 @@
 import org.hibernate.engine.spi.Status;
 import org.hibernate.event.spi.EventSource;
 import org.hibernate.id.Assigned;
+import org.hibernate.id.CompositeNestedGeneratedValueGenerator;
 import org.hibernate.id.IdentifierGenerationException;
 import org.hibernate.internal.CoreLogging;
 import org.hibernate.internal.CoreMessageLogger;
@@ -197,7 +198,8 @@ protected Object performSave(
 
 		processIfSelfDirtinessTracker( entity, SelfDirtinessTracker::$$_hibernate_clearDirtyAttributes );
 
-		if ( persister.getGenerator() instanceof Assigned ) {
+		final Generator generator = persister.getGenerator();
+		if ( generator instanceof Assigned || generator instanceof CompositeNestedGeneratedValueGenerator ) {
 			id = persister.getIdentifier( entity, source );
 			if ( id == null ) {
 				throw new IdentifierGenerationException(