diff --git a/tools/docker/mongo/database_scripts/1.0.0/FENIX-58_init_user_sitecode_ref.js b/tools/docker/mongo/database_scripts/1.0.0/FENIX-58_init_user_sitecode_ref.js
new file mode 100644
index 0000000000000000000000000000000000000000..5a14176b009cae3d959efe6bff60d6510a13cd32
--- /dev/null
+++ b/tools/docker/mongo/database_scripts/1.0.0/FENIX-58_init_user_sitecode_ref.js
@@ -0,0 +1,15 @@
+db = db.getSiblingDB('iam')
+
+print("START FENIX-58_init_user_sitecode_ref.js");
+
+// Update all users without siteCode : add an empty siteCode
+db.users.updateMany(
+  {"siteCode": {$exists: false}},
+  {
+    $set: {
+      "siteCode": ""
+    }
+  }
+);
+
+print("END FENIX-58_init_user_sitecode_ref.js");