javax.faces.el.EvaluationException: javax.ejb.EJBException: java.lang.NullPointerException

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java.lang.NullPointerException
javax.faces.el.EvaluationException: javax.ejb.EJBException: java.lang.NullPointerException
at org.hibernate.id.enhanced.OptimizerFactory$PooledOptimizer.generate(OptimizerFactory.java:414)
at org.hibernate.id.enhanced.TableGenerator.generate(TableGenerator.java:463)
at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:178)
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:134)
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:64)
at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:729)
at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:705)
at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:846)
at edu.city.set.eia.citypress.beans.AbstractFacade.create(AbstractFacade.java:24)
at edu.city.set.eia.citypress.beans.RegisUserFacade.create(RegisUserFacade.java:16)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:287)
at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:287)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:287)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:287)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:287)
at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:287)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:287)
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:287)
at org.jboss.as.ejb3.component.session.SessionInvocationContextInterceptor$CustomSessionInvocationContext.proceed(SessionInvocationContextInterceptor.java:126)

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