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java.lang.IllegalStateException: cannot generate an EntityKey when id is null.	at org.hibernate.engine.spi.EntityEntry.getEntityKey(EntityEntry.java:254)	at org.hibernate.event.internal.DefaultEvictEventListener.onEvict(DefaultEvictEventListener.java:95)	at org.hibernate.internal.SessionImpl.fireEvict(SessionImpl.java:1210)	at org.hibernate.internal.SessionImpl.evict(SessionImpl.java:1203)	at org.grails.orm.hibernate.GrailsHibernateTemplate$8.doInHibernate(GrailsHibernateTemplate.java:327)	at org.grails.orm.hibernate.GrailsHibernateTemplate.doExecute(GrailsHibernateTemplate.java:196)	at org.grails.orm.hibernate.GrailsHibernateTemplate.evict(GrailsHibernateTemplate.java:325)	at org.grails.orm.hibernate.AbstractHibernateGormInstanceApi.discard(AbstractHibernateGormInstanceApi.groovy:179)	at org.grails.datastore.gorm.GormEntity$Trait$Helper.discard(GormEntity.groovy:180)	at org.grails.datastore.gorm.GormEntity$Trait$Helper$discard$3.call(Unknown Source)	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125)	at grails.plugin.springsecurity.ui.RegistrationCode.discard(RegistrationCode.groovy)	at org.grails.datastore.gorm.GormEntity$discard$0.call(Unknown Source)	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117)	at grails.plugin.springsecurity.ui.SpringSecurityUiService.rollbackAndDiscard(SpringSecurityUiService.groovy:545)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1426)	at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:210)	at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:59)	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:52)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:154)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:174)	at grails.plugin.springsecurity.ui.SpringSecurityUiService.handleException(SpringSecurityUiService.groovy:534)	at grails.plugin.springsecurity.ui.strategy.DefaultErrorsStrategy.handleException(DefaultErrorsStrategy.groovy:35)	at grails.plugin.springsecurity.ui.strategy.ErrorsStrategy$handleException.call(Unknown Source)	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)	at grails.plugin.springsecurity.ui.SpringSecurityUiService.save(SpringSecurityUiService.groovy:636)	at grails.plugin.springsecurity.ui.SpringSecurityUiService.save(SpringSecurityUiService.groovy)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1426)	at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:210)	at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:59)	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:52)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:154)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:190)	at grails.plugin.springsecurity.ui.SpringSecurityUiService.$tt__register(SpringSecurityUiService.groovy:181)	at grails.plugin.springsecurity.ui.SpringSecurityUiService$_register_closure17.doCall(SpringSecurityUiService.groovy)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1426)	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)	at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:294)	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1024)	at groovy.lang.Closure.call(Closure.java:414)	at groovy.lang.Closure.call(Closure.java:430)	at grails.transaction.GrailsTransactionTemplate$2.doInTransaction(GrailsTransactionTemplate.groovy:96)	at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)	at grails.transaction.GrailsTransactionTemplate.execute(GrailsTransactionTemplate.groovy:93)	at grails.plugin.springsecurity.ui.SpringSecurityUiService.register(SpringSecurityUiService.groovy)	at grails.plugin.springsecurity.ui.strategy.DefaultRegistrationCodeStrategy.register(DefaultRegistrationCodeStrategy.groovy:40)	at grails.plugin.springsecurity.ui.strategy.RegistrationCodeStrategy$register$0.call(Unknown Source)	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:141)	at grails.plugin.springsecurity.ui.RegisterController.register(RegisterController.groovy:55)	at hvpermit.RegisterController.register(RegisterController.groovy)	at grails.plugin.springsecurity.ui.RegisterController.register(RegisterController.groovy)	at hvpermit.RegisterController.register(RegisterController.groovy)