diff --git a/migrations/202208051010_api_kgon_synchronization_history/up.sql b/migrations/202208051010_api_kgon_synchronization_history/up.sql
index a91e050..541637c 100644
--- a/migrations/202208051010_api_kgon_synchronization_history/up.sql
+++ b/migrations/202208051010_api_kgon_synchronization_history/up.sql
@@ -13,7 +13,7 @@ CREATE INDEX idx_api_kgon_synchronization_history_item ON api_kgon_synchronizati
 
 -- trigger (synchronized_at)
 CREATE TRIGGER tg_api_kgon_synchronization_history_synchronizations
-  BEFORE UPDATE
+  AFTER INSERT
   ON api_kgon_synchronization_history
   FOR EACH ROW
   EXECUTE PROCEDURE update_synchronizations();