@Test
    public void removeItemAfterRegisteringSessionNamespace() throws Exception {
        NamespaceRegistry namespaceRegistry = session.getWorkspace().getNamespaceRegistry();
        namespaceRegistry.registerNamespace("rh", "http://www.redhat.com");
        session.setNamespacePrefix("rh", "http://www.redhat.com");

        assertNotNull(namespaceRegistry.getURI("rh"));
        Node rootNode = session.getRootNode();
        rootNode.addNode("folder", "nt:folder");
        session.save();
        
        session.removeItem("/folder");
        session.save();
    }

 org.modeshape.graph.query.parse.InvalidQueryException: The view references a non-existant column 'jcr:score' in '__ALLNODES__'