diff --git a/incidenceeditor-ng/incidenceattendee.cpp b/incidenceeditor-ng/incidenceattendee.cpp
--- a/incidenceeditor-ng/incidenceattendee.cpp
+++ b/incidenceeditor-ng/incidenceattendee.cpp
@@ -451,12 +451,18 @@
 #ifndef KDEPIM_MOBILE_UI
   Akonadi::ContactGroupExpandJob *expandJob = qobject_cast<Akonadi::ContactGroupExpandJob*>( job );
   Q_ASSERT( expandJob );
-  Q_ASSERT(mExpandGroupJobs.contains(job));
-  KCalCore::Attendee::Ptr attendee = mExpandGroupJobs.take(job);
 
-  int row = dataModel()->attendees().indexOf(attendee);
+  bool replace = mExpandGroupJobs.contains(job);
+  KCalCore::Attendee::Ptr attendee;
+  int row =  dataModel()->attendees().size() - 1;
+  if (replace){
+      attendee = mExpandGroupJobs.take(job);
+      row = dataModel()->attendees().indexOf(attendee);
+      dataModel()->removeRow(row);
+  } else {
+      attendee = KCalCore::Attendee::Ptr(new KCalCore::Attendee(QString(),QString()));
+  }
 
-  dataModel()->removeRow(row);
   const KABC::Addressee::List groupMembers = expandJob->contacts();
   foreach ( const KABC::Addressee &member, groupMembers ) {
       KCalCore::Attendee::Ptr newAt(new KCalCore::Attendee(member.realName(), member.preferredEmail(),