diff --git a/db/migrations/026_menu_info_proc_payment_stock_history.sql b/db/migrations/026_menu_info_proc_payment_stock_history.sql
index e5019f2..856aa83 100644
--- a/db/migrations/026_menu_info_proc_payment_stock_history.sql
+++ b/db/migrations/026_menu_info_proc_payment_stock_history.sql
@@ -1,19 +1,35 @@
--- FITO menu_info 에 매입 입금관리 + 재고이력 메뉴 추가 (사이드바에 노출되도록)
+-- FITO menu_info 에 매입 입금관리 + 재고이력 메뉴 추가 (사이드바 노출용)
 -- 부모: 9000300 매입/입고
+-- menu_info 는 unique constraint 없음 → WHERE NOT EXISTS 로 idempotent 처리
 
--- 기존 seq 재정렬
-UPDATE menu_info SET seq = '12' WHERE objid = '9000302'; -- 입고 처리: 11→12
-UPDATE menu_info SET seq = '13' WHERE objid = '9000303'; -- 재고 관리: 12→13
+-- 기존 seq 재정렬 (안전하게 update)
+UPDATE menu_info SET seq = '12' WHERE objid = '9000302' AND seq != '12';
+UPDATE menu_info SET seq = '13' WHERE objid = '9000303' AND seq != '13';
 
--- 매입 입금관리 (seq 11) + 재고이력 (seq 14) — idempotent
+-- 9000304 매입 입금관리
 INSERT INTO menu_info (objid, menu_type, parent_obj_id, menu_name_kor, menu_name_eng, seq, menu_url, status, system_name, regdate)
-VALUES
-  ('9000304', '1', '9000300', '매입 입금관리', 'Proc Payment', '11', '/m/admin/proc-payments', 'active', 'PMS', NOW()),
-  ('9000305', '1', '9000300', '재고이력',     'Stock History', '14', '/m/admin/inventory/history', 'active', 'PMS', NOW())
-ON CONFLICT (objid) DO UPDATE SET
-  menu_name_kor = EXCLUDED.menu_name_kor,
-  menu_name_eng = EXCLUDED.menu_name_eng,
-  seq           = EXCLUDED.seq,
-  menu_url      = EXCLUDED.menu_url,
-  status        = 'active',
-  system_name   = EXCLUDED.system_name;
+SELECT '9000304', '1', '9000300', '매입 입금관리', 'Proc Payment', '11', '/m/admin/proc-payments', 'active', 'PMS', NOW()
+WHERE NOT EXISTS (SELECT 1 FROM menu_info WHERE objid = '9000304');
+
+UPDATE menu_info SET
+  menu_name_kor = '매입 입금관리',
+  menu_name_eng = 'Proc Payment',
+  parent_obj_id = '9000300',
+  seq = '11',
+  menu_url = '/m/admin/proc-payments',
+  status = 'active'
+WHERE objid = '9000304';
+
+-- 9000305 재고이력
+INSERT INTO menu_info (objid, menu_type, parent_obj_id, menu_name_kor, menu_name_eng, seq, menu_url, status, system_name, regdate)
+SELECT '9000305', '1', '9000300', '재고이력', 'Stock History', '14', '/m/admin/inventory/history', 'active', 'PMS', NOW()
+WHERE NOT EXISTS (SELECT 1 FROM menu_info WHERE objid = '9000305');
+
+UPDATE menu_info SET
+  menu_name_kor = '재고이력',
+  menu_name_eng = 'Stock History',
+  parent_obj_id = '9000300',
+  seq = '14',
+  menu_url = '/m/admin/inventory/history',
+  status = 'active'
+WHERE objid = '9000305';