Fix the duplication of services

django_backend/backend/frontend/models.py

@@ -6,8 +6,10 @@ class State(object):
     def __init__(self, user):
 
         if user.is_authenticated:
-            self.services = models.Service.objects.filter(
-                    groups__user=user
+            self.services = (
+                    models.Service.objects
+                    .filter(groups__user=user)
+                    .distinct()
                     )
         else:
             self.services = []