Regression: cannot edit channel properties

Channel properties cannot be edited anymore. When trying to edit channel properties, an exception is thrown.

Steps to reproduce:
1. login to the archetype CMS
2. open the only only channel
3. click 'Edit Channel'
4. click 'Channel Settings'

Expected: the channel settings are shown
Actual: the channel settings window stays empty and the following exception is logged:

[INFO] [talledLocalContainer] 20.01.2014 12:03:15 WARN http-bio-8080-exec-16 [ChannelStore.getChannel:427] No channel found with id '"gettingstarted-preview"-preview'!
[INFO] [talledLocalContainer] 20.01.2014 12:03:15 ERROR http-bio-8080-exec-16 [DefaultExceptionMapper.internalMap:123] Unexpected error occurred
[INFO] [talledLocalContainer] org.apache.wicket.WicketRuntimeException: Method onRequest of interface org.apache.wicket.behavior.IBehaviorListener targeted at org.wicketstuff.js.ext.ExtEventAjaxBehavior@2705b8f6 on component [ChannelPropertiesWindow [Component id = item]] threw an exception
[INFO] [talledLocalContainer] at org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:268)
[INFO] [talledLocalContainer] at org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:241)
[INFO] [talledLocalContainer] at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:247)
[INFO] [talledLocalContainer] at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:226)
[INFO] [talledLocalContainer] at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:861)
[INFO] [talledLocalContainer] at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
[INFO] [talledLocalContainer] at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
[INFO] [talledLocalContainer] at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
[INFO] [talledLocalContainer] at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
[INFO] [talledLocalContainer] at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
[INFO] [talledLocalContainer] at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201)
[INFO] [talledLocalContainer] at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:282)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.plugins.login.ConcurrentLoginFilter.doFilter(ConcurrentLoginFilter.java:54)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
[INFO] [talledLocalContainer] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
[INFO] [talledLocalContainer] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
[INFO] [talledLocalContainer] at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
[INFO] [talledLocalContainer] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
[INFO] [talledLocalContainer] at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
[INFO] [talledLocalContainer] at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
[INFO] [talledLocalContainer] at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
[INFO] [talledLocalContainer] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
[INFO] [talledLocalContainer] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
[INFO] [talledLocalContainer] at java.lang.Thread.run(Thread.java:744)
[INFO] [talledLocalContainer] Caused by: java.lang.reflect.InvocationTargetException
[INFO] [talledLocalContainer] at sun.reflect.GeneratedMethodAccessor84.invoke(Unknown Source)
[INFO] [talledLocalContainer] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[INFO] [talledLocalContainer] at java.lang.reflect.Method.invoke(Method.java:606)
[INFO] [talledLocalContainer] at org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:258)
[INFO] [talledLocalContainer] ... 30 more
[INFO] [talledLocalContainer] Caused by: java.lang.RuntimeException: Unable to get channel with id '"gettingstarted-preview"-preview'from Channel Manager
[INFO] [talledLocalContainer] at org.onehippo.cms7.channelmanager.channels.ChannelPropertiesWindow.getChannel(ChannelPropertiesWindow.java:349)
[INFO] [talledLocalContainer] at org.onehippo.cms7.channelmanager.channels.ChannelPropertiesWindow.access$500(ChannelPropertiesWindow.java:73)
[INFO] [talledLocalContainer] at org.onehippo.cms7.channelmanager.channels.ChannelPropertiesWindow$3.onEvent(ChannelPropertiesWindow.java:216)
[INFO] [talledLocalContainer] at org.wicketstuff.js.ext.ExtEventAjaxBehavior.handle(ExtEventAjaxBehavior.java:105)
[INFO] [talledLocalContainer] at org.wicketstuff.js.ext.ExtEventAjaxBehavior.respond(ExtEventAjaxBehavior.java:100)
[INFO] [talledLocalContainer] at org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:626)
[INFO] [talledLocalContainer] ... 34 more
[INFO] [talledLocalContainer] Caused by: org.hippoecm.hst.configuration.channel.ChannelNotFoundException: No channel found with id '"gettingstarted-preview"-preview'
[INFO] [talledLocalContainer] at org.onehippo.cms7.channelmanager.channels.ChannelStore.getChannel(ChannelStore.java:428)
[INFO] [talledLocalContainer] at org.onehippo.cms7.channelmanager.channels.ChannelPropertiesWindow.getChannel(ChannelPropertiesWindow.java:347)
[INFO] [talledLocalContainer] ... 39 more