Merge branch 'restrict_group_del' into 'dev'

resrict_deletion

See merge request spatial/postamates!170

service/admin.py

@@ -105,8 +105,11 @@ class PostPvzGroupAdmin(GroupAdmin):
         cache.clear()
 
     def delete_model(self, request, obj):
-        RaschetGroups.objects.filter(obj_id=obj.id).delete()
+        if obj.id in (7, 8, 9, 10, 12, 17, 19, 20, 24, 25):
-        super().delete_model(request, obj)
+            pass
+        else:
+            RaschetGroups.objects.filter(obj_id=obj.id).delete()
+            super().delete_model(request, obj)
 
 
 class OtherObjectsGroupAdmin(GroupAdmin):