diff --git a/luoo_user/src/main/resources/sql/20240904.sql b/luoo_user/src/main/resources/sql/20240904.sql
index caf998a..1e40810 100644
--- a/luoo_user/src/main/resources/sql/20240904.sql
+++ b/luoo_user/src/main/resources/sql/20240904.sql
@@ -15,3 +15,7 @@ create index tb_lottery_user_id_index
 
 create index tb_lottery_user_user_id_index
     on tb_lottery_user (user_id);
+
+alter table tb_lottery_user
+    add constraint tb_lottery_user_pk
+        unique (lottery_id, user_id);
\ No newline at end of file