diff --git a/collection/opendb-admin-menus/collection.json b/collection/opendb-admin-menus/collection.json
index ec95631..5187d0f 100644
--- a/collection/opendb-admin-menus/collection.json
+++ b/collection/opendb-admin-menus/collection.json
@@ -58,6 +58,18 @@
         ],
         "MgoIsUnique": false
       }
+    },
+    {
+      "IndexName": "menu_id",
+      "MgoKeySchema": {
+        "MgoIndexKeys": [
+          {
+            "Name": "menu_id",
+            "Direction": "1"
+          }
+        ],
+        "MgoIsUnique": true
+      }
     }
   ]
 }
\ No newline at end of file