java.lang.IllegalArgumentException: duplicate listener: AbstractJpaProject.ResourceModelListener[2A-67-71-5A](HibernateJpaProject[6D-42-E1-75](jboss-as-kitchensink-html5-mobile))
at org.eclipse.jpt.common.utility.internal.ListenerList.add(ListenerList.java:95)
at org.eclipse.jpt.jpa.core.resource.xml.JpaXmlResource.addResourceModelListener(JpaXmlResource.java:264)
at org.eclipse.jpt.jpa.core.internal.AbstractJpaProject.addJpaFileMaybe_(AbstractJpaProject.java:579)
at org.eclipse.jpt.jpa.core.internal.AbstractJpaProject.addJpaFileMaybe(AbstractJpaProject.java:552)
at org.eclipse.jpt.jpa.core.internal.AbstractJpaProject.synchronizeJpaFiles(AbstractJpaProject.java:1689)
at org.jboss.tools.hibernate.jpt.core.internal.HibernateJpaProject.synchronizeJpaFiles(HibernateJpaProject.java:254)
at org.eclipse.jpt.jpa.core.internal.AbstractJpaProject$InternalResourceDeltaVisitor.fileChangeIsSignificant(AbstractJpaProject.java:1674)
at org.eclipse.jpt.jpa.core.internal.AbstractJpaProject$ResourceDeltaVisitor.fileChanged(AbstractJpaProject.java:1866)
at org.eclipse.jpt.jpa.core.internal.AbstractJpaProject$ResourceDeltaVisitor.visit(AbstractJpaProject.java:1858)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:69)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:80)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:80)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:80)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:80)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:49)
at org.eclipse.jpt.jpa.core.internal.AbstractJpaProject$ResourceDeltaVisitor.visitDelta(AbstractJpaProject.java:1841)
at org.eclipse.jpt.jpa.core.internal.AbstractJpaProject.internalProjectChanged(AbstractJpaProject.java:1652)
at org.eclipse.jpt.jpa.core.internal.AbstractJpaProject.projectChanged(AbstractJpaProject.java:1644)
at org.eclipse.jpt.jpa.core.internal.InternalJpaProjectManager.projectChanged_(InternalJpaProjectManager.java:686)
at org.eclipse.jpt.jpa.core.internal.InternalJpaProjectManager$ProjectChangeEventHandlerCommand.execute(InternalJpaProjectManager.java:672)
at org.eclipse.jpt.common.core.internal.utility.command.JobCommandJob.run(JobCommandJob.java:42)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)