diff --git a/backend/scheme.xlsx b/backend/scheme.xlsx
index 3186469..0c78e65 100644
Binary files a/backend/scheme.xlsx and b/backend/scheme.xlsx differ
diff --git a/backend/schemeV2.mock_data.sql b/backend/schemeV2.mock_data.sql
index a1abace..8584ec8 100644
--- a/backend/schemeV2.mock_data.sql
+++ b/backend/schemeV2.mock_data.sql
@@ -1,3 +1,5 @@
+-- MUST BE UPDATED BEFORE USE
+
 USE borrow_system_new;
 
 -- Optional: keep insert order predictable
diff --git a/backend/schemeV2.sql b/backend/schemeV2.sql
index 31c26bd..c8dbf6f 100644
--- a/backend/schemeV2.sql
+++ b/backend/schemeV2.sql
@@ -25,6 +25,7 @@ CREATE TABLE loans (
   loaned_items_id json NOT NULL DEFAULT ('[]'),
   loaned_items_name json NOT NULL DEFAULT ('[]'),
   deleted bool NOT NULL DEFAULT false,
+  note varchar(500) DEFAULT NULL,
   PRIMARY KEY (id),
   CONSTRAINT fk_loans_username
     FOREIGN KEY (username) REFERENCES users(username)