Upgrading Issue on production data, ecm 2.06.15 to 2.09.07

While upgrading the process crashes with the following exception (consistency checks are turned on):

9.06.2010 13:20:03 ERROR [org.apache.jackrabbit.core.ItemManager.safeGetJCRPath():861] c2f11bcb-7e3c-4e93-8211-2ca1011c70eb: failed to determine path to
29.06.2010 13:20:03 ERROR [org.apache.jackrabbit.core.ItemManager.safeGetJCRPath():861] c2f11bcb-7e3c-4e93-8211-2ca1011c70eb: failed to determine path to
29.06.2010 14:09:36 ERROR [org.hippoecm.repository.updater.UpdaterEngine.migrate():562] error in migration cycle: javax.jcr.nodetype.ConstraintViolationException: /content/documents/duitslandweb/dossiers/archief/Turkse gemeenschap/Onderzoek/2.5 Institutioneel vertrouwen/2.5 Institutioneel vertrouwen/duitslandweb_1_2:rightcontent/duitslandweb_1_2:body/97.portret.2a.jpg needs to be saved as well.
javax.jcr.nodetype.ConstraintViolationException: /content/documents/duitslandweb/dossiers/archief/Turkse gemeenschap/Onderzoek/2.5 Institutioneel vertrouwen/2.5 Institutioneel vertrouwen/duitslandweb_1_2:rightcontent/duitslandweb_1_2:body/97.portret.2a.jpg needs to be saved as well.
at org.apache.jackrabbit.core.ItemImpl.save(ItemImpl.java:1047)
at org.apache.jackrabbit.core.SessionImpl.save(SessionImpl.java:858)
at org.hippoecm.repository.decorating.SessionDecorator.save(SessionDecorator.java:202)
at org.hippoecm.repository.impl.SessionDecorator.save(SessionDecorator.java:177)
at org.hippoecm.repository.updater.UpdaterEngine.upgrade(UpdaterEngine.java:593)
at org.hippoecm.repository.updater.UpdaterEngine.migrate(UpdaterEngine.java:534)
at org.hippoecm.repository.LocalHippoRepository.initializeStartup(LocalHippoRepository.java:349)
at org.hippoecm.repository.LocalHippoRepository.initialize(LocalHippoRepository.java:278)
at org.hippoecm.repository.LocalHippoRepository.<init>(LocalHippoRepository.java:157)
at org.hippoecm.repository.LocalHippoRepository.create(LocalHippoRepository.java:165)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.hippoecm.repository.HippoRepositoryFactory.getHippoRepository(HippoRepositoryFactory.java:238)
at org.hippoecm.repository.RepositoryServlet.init(RepositoryServlet.java:154)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4187)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4496)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:526)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:905)
at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:740)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:500)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:593)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

Thanks in advance for the help,
Jannis