diff --git a/src/main/resources/db/migration/mariadb/V1000_31__chusan_cascade.sql b/src/main/resources/db/migration/mariadb/V1000_31__chusan_cascade.sql
new file mode 100644
index 00000000..975359dc
--- /dev/null
+++ b/src/main/resources/db/migration/mariadb/V1000_31__chusan_cascade.sql
@@ -0,0 +1,10 @@
+alter table chusan_user_misc drop foreign key FK_CHUSANUSERMISC_ON_USER;
+alter table chusan_user_misc add constraint fku_chusan_user_misc
+    foreign key (user_id) references chusan_user_data (id)
+        on delete cascade on update cascade;
+
+alter table chusan_net_battle_log drop foreign key FK_CHUSAN_NET_BATTLE_LOG_ON_USER;
+alter table chusan_net_battle_log add constraint fku_chusan_net_battle_log
+    foreign key (user_id) references chusan_user_data (id)
+        on delete cascade on update cascade;
+