diff --git a/CHANGES.rst b/CHANGES.rst
index 2206069..2cfffe9 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -5,7 +5,7 @@ bin/buildoutChangelog of lizard-area
 0.6 (unreleased)
 ----------------
 
-- Nothing changed yet.
+- Fixed  'IntegrityError' on running 'synchronize_geoobjects_...' tasks
 
 
 0.5 (2012-05-25)
diff --git a/lizard_area/sync_areas.py b/lizard_area/sync_areas.py
index 0836a3a..90bf2b2 100644
--- a/lizard_area/sync_areas.py
+++ b/lizard_area/sync_areas.py
@@ -91,7 +91,7 @@ def geo_object_group(self, username):
         group_name = 'LAYERS'
         group_slug = slugify(group_name)
         geo_object_group, created = GeoObjectGroup.objects.get_or_create(
-            name=group_name, slug=group_slug, created_by=user_obj)
+            name=group_name, slug=group_slug)
         if created:
             geo_object_group.source_log = 'LAYERS'
             geo_object_group.save()