diff --git a/backend/scheme.sql b/backend/scheme.sql
index e7d9c81..400bc31 100644
--- a/backend/scheme.sql
+++ b/backend/scheme.sql
@@ -34,6 +34,7 @@ CREATE TABLE `loans` (
   `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP,
   `loaned_items_id` json NOT NULL DEFAULT ('[]'),
   `loaned_items_name` json NOT NULL DEFAULT ('[]'),
+  `deleted` bool NOT NULL DEFAULT false,
   PRIMARY KEY (`id`),
   UNIQUE KEY `loan_code` (`loan_code`)
 );