Caused by: java.lang.ClassCastException: org.hibernate.mapping.SingleTableSubclass cannot be cast to org.hibernate.mapping.RootClass
	at org.hibernate.cfg.annotations.PropertyBinder.bind(PropertyBinder.java:214)
	at org.hibernate.cfg.annotations.PropertyBinder.makePropertyValueAndBind(PropertyBinder.java:205)
	at org.hibernate.cfg.AnnotationBinder.processElementAnnotations(AnnotationBinder.java:2038)
	at org.hibernate.cfg.AnnotationBinder.processIdPropertiesIfNotAlready(AnnotationBinder.java:767)
	at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:686)
	at org.hibernate.cfg.Configuration$MetadataSourceQueue.processAnnotatedClassesQueue(Configuration.java:3512)
	at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3466)
	at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1355)
	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1756)
	at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:96)
	at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:914)
	at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:899)
	at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:59)
	at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79)
	at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)