diff --git a/db/migrations/011_extra_lines_nullable.sql b/db/migrations/011_extra_lines_nullable.sql
new file mode 100644
index 0000000..2953727
--- /dev/null
+++ b/db/migrations/011_extra_lines_nullable.sql
@@ -0,0 +1,13 @@
+-- 011_extra_lines_nullable.sql
+-- v0.5 (2026-05-07)
+-- 택배(DELIVERY)/용차(CHARTER) 라인은 item_objid 가 없는 가상 라인이므로
+-- NOT NULL 제약을 풀어준다.
+
+BEGIN;
+
+ALTER TABLE momo_order_items ALTER COLUMN item_objid DROP NOT NULL;
+
+COMMENT ON COLUMN momo_order_items.item_objid
+  IS '품목 OBJID. ITEM 라인은 NOT NULL, DELIVERY/CHARTER 라인은 NULL.';
+
+COMMIT;