Creating an external link in xinha results in two warning log messages

23.11.2009 11:24:42 WARN [org.apache.wicket.markup.html.form.AbstractTextComponent.getModelType():166] Couldn't resolve model type of Model:classname=[org.apache.wicket.model.PropertyModel]:nestedModel=[

{f_title=, f_other_target=, f_target=, f_href=}]:expression=[f_href] for [MarkupContainer [Component id = widget]], please set the type yourself.
23.11.2009 11:24:42 WARN [org.apache.wicket.markup.html.form.AbstractTextComponent.getModelType():166] Couldn't resolve model type of Model:classname=[org.apache.wicket.model.PropertyModel]:nestedModel=[{f_title=, f_other_target=, f_target=, f_href=}

]:expression=[f_title] for [MarkupContainer [Component id = widget]], please set the type yourself.