fix doublon des routes dans le filtre

services/admin.py

@@ -42,7 +42,7 @@ class RouteFilter(admin.SimpleListFilter):
     parameter_name = 'route'
 
     def lookups(self, request, model_admin):
-        return ServiceAllocation.objects.filter(active=True).values_list('route__pk', 'route__name')
+        return ServiceAllocation.objects.filter(active=True).values_list('route__pk', 'route__name').distinct()
 
     def queryset(self, request, queryset):
         try: