diff --git a/src/main/resources/db/migration/mariadb/V1000_27__chusan_net_battle_log.sql b/src/main/resources/db/migration/mariadb/V1000_27__chusan_net_battle_log.sql
index 755a18a8..97342bba 100644
--- a/src/main/resources/db/migration/mariadb/V1000_27__chusan_net_battle_log.sql
+++ b/src/main/resources/db/migration/mariadb/V1000_27__chusan_net_battle_log.sql
@@ -50,6 +50,3 @@ CREATE TABLE chusan_net_battle_log
 
 ALTER TABLE chusan_net_battle_log
     ADD CONSTRAINT FK_CHUSAN_NET_BATTLE_LOG_ON_USER FOREIGN KEY (user_id) REFERENCES chusan_user_data (id);
-
-ALTER TABLE chusan_net_battle_log
-    ADD CONSTRAINT FK_CHUSAN_NET_BATTLE_LOG_ON_USER FOREIGN KEY (user_id) REFERENCES chusan_user_data (id);
\ No newline at end of file