diff --git a/backend/app.js b/backend/app.js
index b4e02616d076613058149a28c2af09d0343fa187..502aa58b01854a04a49864735ce59de5d7befdaf 100644
--- a/backend/app.js
+++ b/backend/app.js
@@ -23,7 +23,7 @@ db.once("open", function() {
 });
 
 
-toucans.updateMany({}, {"$set":{"toucan_id": { "$concat": ["$title", "-", { $year: "$date" }]}}});
+toucans.updateMany({}, {$set:{"toucan_id": { $concat: ["$title", "-", "$date"]}}});
 
 app.use(cors());
 app.use(bodyParser.json());