diff --git a/erpnext/controllers/accounts_controller.py b/erpnext/controllers/accounts_controller.py
index 081abe1..843103d 100644
--- a/erpnext/controllers/accounts_controller.py
+++ b/erpnext/controllers/accounts_controller.py
@@ -3055,11 +3055,20 @@
 		parent.update_ordered_qty()
 		parent.update_ordered_and_reserved_qty()
 		parent.update_receiving_percentage()
-		if parent.is_old_subcontracting_flow:
-			if should_update_supplied_items(parent):
-				parent.update_reserved_qty_for_subcontract()
-				parent.create_raw_materials_supplied()
-			parent.save()
+
+		if parent.is_subcontracted:
+			if parent.is_old_subcontracting_flow:
+				if should_update_supplied_items(parent):
+					parent.update_reserved_qty_for_subcontract()
+					parent.create_raw_materials_supplied()
+				parent.save()
+			else:
+				if not parent.can_update_items():
+					frappe.throw(
+						_(
+							"Items cannot be updated as Subcontracting Order is created against the Purchase Order {0}."
+						).format(frappe.bold(parent.name))
+					)
 	else:  # Sales Order
 		parent.validate_warehouse()
 		parent.update_reserved_qty()