diff -r 88e08fd7a160 -r c63f2508c34d src/hp/forms.py
--- a/src/hp/forms.py	Tue Nov 27 01:52:43 2012 +0100
+++ b/src/hp/forms.py	Wed Nov 28 02:12:51 2012 +0100
@@ -21,14 +21,17 @@
 
     def __init__(self, *args, **kwargs):
         super(VideoKCRelForm, self).__init__(*args, **kwargs)
-        
+                
         url = settings.LDT_API_URL + "contents/"
         contents = get_all_objects(url, {'limit':settings.LDT_MAX_FETCH}, 'front_project')
-        self.fields['iri_id'].widget.choices = [(content['iri_id'], content['title']) for content in contents]
+        
+        #remove contents that already are associated        
+        associated_rel = dict([(rel.iri_id, rel) for rel in VideoKCRel.objects.all()])
+        
+        self.fields['iri_id'].widget.choices = [(content['iri_id'], content['title']) for content in contents if (content['iri_id'] not in associated_rel) or (content['iri_id'] == self['iri_id'].value())]
         
         url = settings.LDT_API_URL + "projects/"
         projects = get_all_objects(url, {'state': 2, 'limit': settings.LDT_MAX_FETCH}, None)
-        logger.debug("projects " + repr(projects))
         values = [(None, "-----")]
         values.extend([(project['ldt_id'], project['title']) for project in projects])