in a clustered environment when adding events pages file from one of the nodes from an import file, the other node outputs errors

Please find attached the error I get when adding an import of pages from one of the nodes in cluster. On the other node I get the following output

2009-02-19 11:32:42,914: INFO [org.jahia.services.content.automation.RulesListener] - Properties extraction fired
2009-02-19 11:32:42,914: INFO [org.jahia.services.content.automation.RulesListener] - Properties extraction fired
2009-02-19 11:32:42,916: INFO [org.jahia.services.content.automation.RulesListener] - Properties extraction fired
2009-02-19 11:32:42,920: ERROR [org.jahia.services.importexport.ImportExportBaseService] - RepositoryException
javax.jcr.InvalidItemStateException: Item cannot be saved; it seems to have beenremoved externally: node /
at org.apache.jackrabbit.core.ItemImpl.getTransientStates(ItemImpl.java:256)
at org.apache.jackrabbit.core.ItemImpl.save(ItemImpl.java:931)
at org.apache.jackrabbit.core.SessionImpl.save(SessionImpl.java:846)
at org.jahia.services.content.JCRItemWrapperImpl.saveSession(JCRItemWrapperImpl.java:138)
at org.jahia.services.content.JCRNodeDecorator.saveSession(JCRNodeDecorator.java:612)
at org.jahia.services.importexport.ImportExportBaseService.ensureFile(ImportExportBaseService.java:1058)
at org.jahia.services.importexport.ImportExportBaseService.importFile(ImportExportBaseService.java:832)
at org.jahia.services.importexport.ImportExportBaseService.importFile(ImportExportBaseService.java:740)
at org.jahia.services.importexport.ImportExportBaseService$$FastClassByCGLIB$$de1c40f7.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:700)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at org.springframework.aop.interceptor.AbstractTraceInterceptor.invoke(AbstractTraceInterceptor.java:113)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:635)
at org.jahia.services.importexport.ImportExportBaseService$$EnhancerByCGLIB$$301c89f5.importFile(<generated>)
at org.jahia.services.importexport.ImportJob.executeJahiaJob(ImportJob.java:109)
at org.jahia.services.scheduler.BackgroundJob.execute(BackgroundJob.java:164)
at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
2009-02-19 11:32:42,924: INFO [org.jahia.services.content.automation.RulesListener] - Rules executed for [/content/sites/mySite/files/shared/a/1/001.jpg/jcr:content/jcr:data, /content/sites/mySite/files/shared/a/1/001.jpg/jcr:content/jcr:mimeType, /content/sites/mySite/files/shared/a/1/001.jpg]
2009-02-19 11:32:42,965: ERROR [org.jahia.services.importexport.ImportExportBaseService] - RepositoryException
javax.jcr.InvalidItemStateException: Item cannot be saved; it seems to have beenremoved externally: node /
at org.apache.jackrabbit.core.ItemImpl.getTransientStates(ItemImpl.java:256)
at org.apache.jackrabbit.core.ItemImpl.save(ItemImpl.java:931)
at org.apache.jackrabbit.core.SessionImpl.save(SessionImpl.java:846)
at org.jahia.services.content.JCRItemWrapperImpl.saveSession(JCRItemWrapperImpl.java:138)
at org.jahia.services.content.JCRNodeDecorator.saveSession(JCRNodeDecorator.java:612)
at org.jahia.services.importexport.ImportExportBaseService.ensureFile(ImportExportBaseService.java:1058)
at org.jahia.services.importexport.ImportExportBaseService.importFile(ImportExportBaseService.java:832)
at org.jahia.services.importexport.ImportExportBaseService.importFile(ImportExportBaseService.java:740)
at org.jahia.services.importexport.ImportExportBaseService$$FastClassByCGLIB$$de1c40f7.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)