Description of problem:
When attempting to sync errata to a custom channel, customer gets an internal server error.  This seems to be specific to one errata for mkinitrd (which matches the stacktrace below).  It seems somehow when loading the errata there's a hibernate object collision.

Stacktrace in catalina.out:
2010-06-02 03:51:01,426 [TP-Processor6] ERROR org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/rhn].[action] - Servlet.service() for servlet action threw exception
org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.redhat.rhn.domain.errata.impl.PublishedKeyword#mkinitrd]
        at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:168)
        at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:121)
        at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
        at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
        at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:94)
        at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
        at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:507)
        at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:499)
        at org.hibernate.engine.CascadingAction$5.cascade(CascadingAction.java:218)
        at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:268)
        at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:216)
        at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)
        at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:296)
        at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:242)
        at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:219)
        at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)
        at org.hibernate.engine.Cascade.cascade(Cascade.java:130)
        at org.hibernate.event.def.AbstractFlushingEventListener.cascadeOnFlush(AbstractFlushingEventListener.java:131)
        at org.hibernate.event.def.AbstractFlushingEventListener.prepareEntityFlushes(AbstractFlushingEventListener.java:122)        at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:65)
        at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26)
        at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
        at com.redhat.rhn.common.db.datasource.CachedStatement.stealConnection(CachedStatement.java:853)
        at com.redhat.rhn.common.db.datasource.CachedStatement.execute(CachedStatement.java:441)
        at com.redhat.rhn.common.db.datasource.CachedStatement.execute(CachedStatement.java:431)
        at com.redhat.rhn.common.db.datasource.CachedStatement.execute(CachedStatement.java:335)
        at com.redhat.rhn.common.db.datasource.CachedStatement.execute(CachedStatement.java:340)
        at com.redhat.rhn.common.db.datasource.CachedStatement.execute(CachedStatement.java:280)
        at com.redhat.rhn.common.db.datasource.SelectMode.execute(SelectMode.java:105)
        at com.redhat.rhn.manager.errata.ErrataManager.lookupErrata(ErrataManager.java:652)
        at com.redhat.rhn.frontend.action.channel.manage.SyncErrataPackagesAction.syncErrata(SyncErrataPackagesAction.java:136)
        at com.redhat.rhn.frontend.action.channel.manage.SyncErrataPackagesAction.execute(SyncErrataPackagesAction.java:93)
        at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:237)
        at com.redhat.rhn.frontend.struts.RhnRequestProcessor.process(RhnRequestProcessor.java:82)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
        at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at com.redhat.rhn.frontend.servlets.AuthFilter.doFilter(AuthFilter.java:73)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:142)
        at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:58)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at com.redhat.rhn.frontend.servlets.LocalizedEnvironmentFilter.doFilter(LocalizedEnvironmentFilter.java:67)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at com.redhat.rhn.frontend.servlets.EnvironmentFilter.doFilter(EnvironmentFilter.java:108)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at com.redhat.rhn.frontend.servlets.SessionFilter.doFilter(SessionFilter.java:55)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at com.redhat.rhn.frontend.servlets.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:97)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
        at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
        at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
        at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:775)
        at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:704)
        at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:897)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
        at java.lang.Thread.run(Thread.java:736)
...

Version-Release number of selected component (if applicable):
Red Hat Network (RHN) Satellite 5.3.0

How reproducible:
Always (with customer database dump).

Steps to Reproduce:
1. Import customer db;
2. Go to Channels --> Manage Software Channels --> Select SAGA AS5 --> Errata --> Sync --> 
3. 2 errata (CLA-2010:0403 and CLA-2010-0390) appears --> Select ALL --> Sync Errata --> confirm

Actual results:
Internal Server Error due to org.hibernate.NonUniqueObjectException (see above)

Expected results:
Errata sync succeeds, no ISE or exception

Additional info:
possible workaround - add the 2 mkinitrd packages in the errata for now instead of sync'ing the errata