Making a (string) field in the template editor first multiple and then require results in stacktrace and four warnings in the logs

23.11.2009 12:10:47 ERROR [org.hippoecm.frontend.plugin.impl.PluginFactory.createPlugin():89] java.lang.IllegalArgumentException: Setting the index on a single valued property
java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedConstructorAccessor115.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.hippoecm.frontend.plugin.impl.PluginFactory.createPlugin(PluginFactory.java:71)
at org.hippoecm.frontend.plugin.impl.PluginManager.start(PluginManager.java:83)
at org.hippoecm.frontend.plugin.impl.PluginContext.start(PluginContext.java:249)
at org.hippoecm.frontend.plugin.impl.ClusterControl.start(ClusterControl.java:111)
at org.hippoecm.frontend.editor.builder.RenderPluginEditorPlugin.updatePreview(RenderPluginEditorPlugin.java:282)
at org.hippoecm.frontend.editor.plugins.field.FieldPluginEditorPlugin.access$400(FieldPluginEditorPlugin.java:48)
at org.hippoecm.frontend.editor.plugins.field.FieldPluginEditorPlugin$PropertyEditor$3.onEvent(FieldPluginEditorPlugin.java:119)
at org.hippoecm.frontend.model.event.ObservableRegistry$ObservationContext.notifyObservers(ObservableRegistry.java:77)
at org.hippoecm.frontend.editor.builder.TemplateBuilder$BuilderTypeDescriptor$1.onEvent(TemplateBuilder.java:348)
at org.hippoecm.frontend.model.event.ObservableRegistry$ObservationContext.notifyObservers(ObservableRegistry.java:77)
at org.hippoecm.editor.tools.JcrTypeDescriptor$1.onEvent(JcrTypeDescriptor.java:432)
at org.hippoecm.frontend.model.event.ObservableRegistry$ObservationContext.notifyObservers(ObservableRegistry.java:77)
at org.hippoecm.editor.tools.JcrFieldDescriptor.processEvents(JcrFieldDescriptor.java:166)
at org.hippoecm.frontend.model.ocm.JcrObject$1.onEvent(JcrObject.java:115)
at org.hippoecm.frontend.model.event.ObservableRegistry$ObservationContext.notifyObservers(ObservableRegistry.java:77)
at org.hippoecm.frontend.model.event.JcrEventListener.onEvent(JcrEventListener.java:64)
at org.hippoecm.frontend.JcrObservationManager$JcrListener.process(JcrObservationManager.java:646)
at org.hippoecm.frontend.JcrObservationManager.processEvents(JcrObservationManager.java:1050)
at org.hippoecm.frontend.Home.processEvents(Home.java:150)
at org.hippoecm.frontend.PluginRequestCycleProcessor.processEvents(PluginRequestCycleProcessor.java:37)
at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1250)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1428)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:468)
at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:301)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1115)
at org.hippoecm.frontend.plugins.login.ConcurrentLoginFilter.doFilter(ConcurrentLoginFilter.java:54)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1115)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:361)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:879)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:741)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:213)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:403)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522)
Caused by: java.lang.IllegalArgumentException: Setting the index on a single valued property
at org.hippoecm.frontend.model.properties.JcrPropertyValueModel.setIndex(JcrPropertyValueModel.java:290)
at org.hippoecm.frontend.model.properties.JcrPropertyValueModel.<init>(JcrPropertyValueModel.java:104)
at org.hippoecm.frontend.model.PropertyValueProvider.addNew(PropertyValueProvider.java:101)
at org.hippoecm.frontend.editor.plugins.field.AbstractFieldPlugin.getProvider(AbstractFieldPlugin.java:215)
at org.hippoecm.frontend.editor.plugins.field.AbstractFieldPlugin.<init>(AbstractFieldPlugin.java:119)
at org.hippoecm.frontend.editor.plugins.field.PropertyFieldPlugin.<init>(PropertyFieldPlugin.java:59)
... 48 more
23.11.2009 12:10:47 WARN [org.hippoecm.frontend.plugin.impl.PluginContext.registerService():174] plugin <unknown> is registering a service when stopping; ignoring
23.11.2009 12:10:47 WARN [org.hippoecm.frontend.editor.builder.RenderPluginEditorPlugin.updatePreview():290] No render service found in plugin preview
23.11.2009 12:10:47 WARN [org.apache.wicket.markup.html.form.AbstractTextComponent.getModelType():166] Couldn't resolve model type of Model:classname=[org.apache.wicket.model.PropertyModel]:nestedModel=[Model:classname=[org.apache.wicket.model.Model]:object=[]]:expression=[size] for [MarkupContainer [Component id = widget]], please set the type yourself.
23.11.2009 12:10:47 WARN [org.apache.wicket.markup.resolver.WicketMessageResolver$MessageContainer.onComponentTagBody():221] No value found for wicket:message tag with key: mandatory