Unable to add another translation once I already did one

reproduction:

in the demosuite / cms :

Goto news/2009/01 and create translated document for 'launch cms' for French
Goto news/2009/02 and try to also create translated document for 'named-vendor-watch'

Action failed with following stack. I cannot add another translation

18.11.2010 11:40:42 ERROR [org.hippoecm.frontend.translation.workflow.TranslationWorkflowPlugin$AddTranslationAction.saveFolder():272] Workflow prevented storing translation for 4c2d36c5-ee77-4c4e-8936-fa178b9e6a07 due to No category found to use for adding translation to target folder
18.11.2010 11:40:42 WARN [org.hippoecm.addon.workflow.CompatibilityWorkflowPlugin$WorkflowAction$WorkflowDialog.onOk():211] Error during workflow execution
org.hippoecm.repository.api.WorkflowException: could-not-create-folders
at org.hippoecm.addon.workflow.CompatibilityWorkflowPlugin$WorkflowAction.execute(CompatibilityWorkflowPlugin.java:167)
at org.hippoecm.addon.workflow.CompatibilityWorkflowPlugin$WorkflowAction$WorkflowDialog.execute(CompatibilityWorkflowPlugin.java:228)
at org.hippoecm.addon.workflow.CompatibilityWorkflowPlugin$WorkflowAction$WorkflowDialog.onOk(CompatibilityWorkflowPlugin.java:209)
at org.hippoecm.frontend.dialog.AbstractDialog.handleSubmit(AbstractDialog.java:580)
at org.hippoecm.frontend.dialog.AbstractDialog$3.onSubmit(AbstractDialog.java:430)
at org.hippoecm.frontend.dialog.AbstractDialog$ButtonWrapper$1.onSubmit(AbstractDialog.java:251)
at org.apache.wicket.ajax.markup.html.form.AjaxButton$1.onSubmit(AjaxButton.java:101)
at org.apache.wicket.ajax.form.AjaxFormSubmitBehavior.onEvent(AjaxFormSubmitBehavior.java:143)
at org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:177)
at org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:300)
at org.apache.wicket.request.target.component.listener.BehaviorRequestTarget.processEvents(BehaviorRequestTarget.java:142)
at org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92)
at org.hippoecm.frontend.PluginRequestCycleProcessor.processEvents(PluginRequestCycleProcessor.java:95)
at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1250)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1436)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:484)
at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:317)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)
at org.hippoecm.frontend.plugins.login.ConcurrentLoginFilter.doFilter(ConcurrentLoginFilter.java:54)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:387)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:879)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:747)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)