diff --git a/app/src/test/resources/sample/task/postgres/postgres-balance-transaction-task.yaml b/app/src/test/resources/sample/task/postgres/postgres-balance-transaction-task.yaml
index c4cd1ed..7243efe 100644
--- a/app/src/test/resources/sample/task/postgres/postgres-balance-transaction-task.yaml
+++ b/app/src/test/resources/sample/task/postgres/postgres-balance-transaction-task.yaml
@@ -39,6 +39,9 @@ steps:
     schema:
       fields:
         - name: "account_number"
+          generator:
+            options:
+              isUnique: true
         - name: "create_time"
           type: "timestamp"
         - name: "transaction_id"