diff --git a/sql.go b/sql.go
index b44a142..024b723 100644
--- a/sql.go
+++ b/sql.go
@@ -154,7 +154,6 @@ func initDB() {
 							,status			VARCHAR(32)
 							,end			DATETIME NOT NULL
 							,FOREIGN KEY (obj_id) REFERENCES obj(id) ON DELETE CASCADE
-							,UNIQUE KEY (lot_id)
 						  ) ENGINE = InnoDB CHARSET=utf8mb4 COLLATE utf8mb4_unicode_ci;`)
 	failOnError(err, "initDB : create table obj_msg_auction_announce")
 
@@ -192,7 +191,7 @@ func initDB() {
 							,FOREIGN KEY (obj_id) REFERENCES obj(id) ON DELETE CASCADE
 							,UNIQUE KEY (intl_id)
 						  ) ENGINE = InnoDB CHARSET=utf8mb4 COLLATE utf8mb4_unicode_ci;`)
-	failOnError(err, "initDB : create table obj_auction_announce")
+	failOnError(err, "initDB : create table obj_item")
 
 	_, err = db.Exec(`CREATE TABLE obj_job (
 							 obj_id			BIGINT UNSIGNED NOT NULL