diff --git a/src/main/resources/db/migration/V14__db_make_user_ref_id_unique.sql b/src/main/resources/db/migration/V14__db_make_user_ref_id_unique.sql
new file mode 100644
index 0000000000000000000000000000000000000000..66343f96e9cc695ad7053ca6bf7de564c4650049
--- /dev/null
+++ b/src/main/resources/db/migration/V14__db_make_user_ref_id_unique.sql
@@ -0,0 +1 @@
+alter table "user" add constraint user_ref_id_unique unique (user_ref_id);
\ No newline at end of file