diff --git a/xos/models/models.py b/xos/models/models.py
index 594255a..4493452 100644
--- a/xos/models/models.py
+++ b/xos/models/models.py
@@ -29,6 +29,8 @@
     class Meta:
         proxy = True
 
+    ## TODO do not allow enbId duplicates
+
 
 class Handover(Handover_decl):
     class Meta: