Windchill PDMLink でアセンブリ ファミリー テーブルを削除しようとすると、「永続化エラーが発生しました。システム メッセージが続きます」というエラーが表示される

MS ログからのスタックは次のようになります。

 ERROR [ajp-nio-127.0.0.1-8011-exec-8] com.ptc.core.task.Task wcadmin - Task.execute :: (wt.pom.pomResource/0) wt.pom.PersistenceException: A persistence error occurred. System message follows: Nested exception is: wt.util.WTException: java.lang.NullPointerException Nested exception is: java.lang.NullPointerException (wt.pom.pomResource/0) wt.pom.PersistenceException: A persistence error occurred. System message follows: Nested exception is: wt.util.WTException: java.lang.NullPointerException Nested exception is: java.lang.NullPointerException at wt.epm.workspaces.EPMTransparentWSTransactionListener.toRemove(EPMTransparentWSTransactionListener.java:99) at wt.epm.workspaces.EPMStandardWorkspaceManager$6.notifyVetoableMultiObjectEvent(EPMStandardWorkspaceManager.java:368) at wt.events.StandardKeyedEventBranch.intDispatchEvent(StandardKeyedEventBranch.java:306) at wt.events.StandardKeyedEventBranch.dispatchVetoableMultiObjectEvent(StandardKeyedEventBranch.java:268) at wt.events.StandardKeyedEventDispatcher.intDispatchEvent(StandardKeyedEventDispatcher.java:306) at wt.events.StandardKeyedEventDispatcher.dispatchVetoableMultiObjectEvent(StandardKeyedEventDispatcher.java:244) at wt.services.StandardManagerService.intDispatchVetoableEvent(StandardManagerService.java:412) at wt.services.StandardManagerService.dispatchVetoableMultiObjectEvent(StandardManagerService.java:314) at wt.vc.baseline.StandardBaselineService.dispatchVetoableMultiObjectEvent(StandardBaselineService.java:1514) at wt.vc.baseline.StandardBaselineService.remove(StandardBaselineService.java:1017) at wt.vc.baseline.StandardBaselineService$WTCollectionOperation.execute(StandardBaselineService.java:1498) at wt.vc.baseline.BaselineOperation.executeTransaction(BaselineOperation.java:100) at wt.vc.baseline.BaselineOperation.executeLockingTransaction(BaselineOperation.java:55) at wt.vc.baseline.StandardBaselineService.removeFromBaseline(StandardBaselineService.java:704) 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 wt.services.ServiceFactory$ServerInvocationHandler.invoke(ServiceFactory.java:399) at com.sun.proxy.$Proxy358.removeFromBaseline(Unknown Source) at wt.epm.familytable.EPMDeleteDataContainer.removeFamilyTablesToDeleteFromBaselines(EPMDeleteDataContainer.java:408) at wt.epm.familytable.EPMStandardFamilyTableManager$FTTransactionListener.finishTransaction(EPMStandardFamilyTableManager.java:2961) at wt.pom.TransactionManager$FinishTransactionListener.fire(TransactionManager.java:1596) at wt.pom.TransactionManager.fireTransactionListener(TransactionManager.java:1556) at wt.pom.TransactionManager.finishTransaction(TransactionManager.java:491) at wt.pom.TransactionManager.commitTransaction(TransactionManager.java:439) at wt.pom.BasicTransactionMonitor.commitTransaction(BasicTransactionMonitor.java:64) at wt.pom.PersistentObjectManager.commitTransaction(PersistentObjectManager.java:404) at wt.pom.Transaction.commit(Transaction.java:744) at wt.vc.StandardVersionControlService.deleteIterations(StandardVersionControlService.java:3368) 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 wt.services.ServiceFactory$ServerInvocationHandler.invoke(ServiceFactory.java:399) at com.sun.proxy.$Proxy46.deleteIterations(Unknown Source) at wt.dataops.delete.DeleteTask._run(DeleteTask.java:320) at com.ptc.core.task.AtomicTask.run(AtomicTask.java:58) at com.ptc.core.task.Task.execute(Task.java:262) at com.ptc.core.task.StandardTaskManager.runTask(StandardTaskManager.java:183) at com.ptc.core.task.StandardTaskManager.retryTask(StandardTaskManager.java:591) 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 wt.services.ServiceFactory$ServerInvocationHandler.invoke(ServiceFactory.java:399) at com.sun.proxy.$Proxy226.retryTask(Unknown Source) at com.ptc.core.htmlcomp.console.RetryTaskProcessor.retryTask(RetryTaskProcessor.java:152) 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 wt.htmlutil.MethodAction.action(MethodAction.java:132) at wt.htmlutil.CachedHTMLTemplate.execute(CachedHTMLTemplate.java:162) at wt.htmlutil.CachedHTMLTemplate.execute(CachedHTMLTemplate.java:123) at wt.htmlutil.HTMLTemplate.process(HTMLTemplate.java:229) at wt.templateutil.processor.DefaultTemplateProcessor.handleRequest(DefaultTemplateProcessor.java:524) at wt.enterprise.URLProcessor.URLTemplateAction(URLProcessor.java:278) 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 wt.httpgw.HTTPServletResponse.invoke(HTTPServletResponse.java:264) at wt.httpgw.MethodRequestHandler.handleRequest(MethodRequestHandler.java:92) at wt.httpgw.HTTPGatewayServlet.serviceWithoutFilters(HTTPGatewayServlet.java:336) at wt.httpgw.HTTPAuthGatewayServlet.serviceWithoutFilters(HTTPAuthGatewayServlet.java:86) at wt.httpgw.FilterChainImpl.doFilter(FilterChainImpl.java:94) at wt.session.SessionContextDestroyer.doFilterInternal(SessionContextDestroyer.java:136) at wt.session.SessionContextDestroyer.doFilter(SessionContextDestroyer.java:184) at wt.httpgw.FilterChainImpl.doFilter(FilterChainImpl.java:81) at wt.httpgw.HTTPGatewayServlet.service(HTTPGatewayServlet.java:235) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at wt.licenseusage.licensing.LicenseFilter.doFilter(LicenseFilter.java:47) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.ptc.jws.servlet.filter.WsdlServletFilter.doFilter(WsdlServletFilter.java:80) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.ptc.core.components.filter.JCAFilter.doFilter(JCAFilter.java:97) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.ptc.core.ui.validation.URLValidationFilter.doFilter(URLValidationFilter.java:86) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at wt.httpgw.filter.WTContextBeanFilter.doWithWtContextBeanHandler(WTContextBeanFilter.java:104) at wt.httpgw.filter.WTContextBeanFilter.doFilter(WTContextBeanFilter.java:58) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at wt.servlet.CompressionFilter.doFilter(CompressionFilter.java:301) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at wt.servlet.RequestInterrupter.doFilter(RequestInterrupter.java:335) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at wt.servlet.ServletRequestMonitor.doFilter(ServletRequestMonitor.java:1660) at wt.servlet.ServletRequestMonitorFilter.doFilter(ServletRequestMonitorFilter.java:56) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:543) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:508) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:818) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1633) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748)