fix: work order serial no issue

erpnext/manufacturing/doctype/work_order/test_work_order.py

@@ -1657,6 +1657,60 @@ class TestWorkOrder(FrappeTestCase):
 		job_card2.time_logs = []
 		job_card2.save()
 
+	def test_make_serial_no_batch_from_work_order_for_serial_no(self):
+		item_code = "Test Serial No Item For Work Order"
+		warehouse = "_Test Warehouse - _TC"
+		raw_materials = [
+			"Test RM Item 1 for Serial No Item In Work Order",
+		]
+
+		make_item(
+			item_code,
+			{
+				"has_stock_item": 1,
+				"has_serial_no": 1,
+				"serial_no_series": "TSNIFWO-.#####",
+			},
+		)
+
+		for rm_item in raw_materials:
+			make_item(
+				rm_item,
+				{
+					"has_stock_item": 1,
+				},
+			)
+
+			test_stock_entry.make_stock_entry(item_code=rm_item, target=warehouse, qty=10, basic_rate=100)
+
+		bom = make_bom(item=item_code, raw_materials=raw_materials)
+
+		frappe.db.set_single_value("Manufacturing Settings", "make_serial_no_batch_from_work_order", 1)
+
+		wo_order = make_wo_order_test_record(
+			item=item_code,
+			bom_no=bom.name,
+			qty=5,
+			skip_transfer=1,
+			from_wip_warehouse=1,
+		)
+
+		serial_nos = frappe.get_all(
+			"Serial No",
+			filters={"item_code": item_code, "work_order": wo_order.name},
+		)
+
+		self.assertEqual(len(serial_nos), 5)
+
+		stock_entry = frappe.get_doc(make_stock_entry(wo_order.name, "Manufacture", 5))
+
+		stock_entry.submit()
+		for row in stock_entry.items:
+			if row.is_finished_item:
+				self.assertEqual(sorted(get_serial_nos(row.serial_no)), sorted(get_serial_nos(serial_nos)))
+
+		frappe.db.set_single_value("Manufacturing Settings", "make_serial_no_batch_from_work_order", 0)
+
 
 def prepare_data_for_workstation_type_check():
 	from erpnext.manufacturing.doctype.operation.test_operation import make_operation
@@ -1886,6 +1940,7 @@ def make_wo_order_test_record(**args):
 	wo_order.sales_order = args.sales_order or None
 	wo_order.planned_start_date = args.planned_start_date or now()
 	wo_order.transfer_material_against = args.transfer_material_against or "Work Order"
+	wo_order.from_wip_warehouse = args.from_wip_warehouse or None
 
 	if args.source_warehouse:
 		for item in wo_order.get("required_items"):

erpnext/stock/doctype/serial_no/serial_no.py

@@ -307,6 +307,11 @@ def validate_serial_no(sle, item_det):
 			allow_existing_serial_no = cint(
 				frappe.get_cached_value("Stock Settings", "None", "allow_existing_serial_no")
 			)
+
+			work_order = None
+			if sle.voucher_no and sle.voucher_type == "Stock Entry":
+				work_order = frappe.get_cached_value("Stock Entry", sle.voucher_no, "work_order")
+
 			for serial_no in serial_nos:
 				if frappe.db.exists("Serial No", serial_no):
 					sr = frappe.db.get_value(
@@ -324,6 +329,7 @@ def validate_serial_no(sle, item_det):
 							"purchase_document_no",
 							"company",
 							"status",
+							"work_order",
 						],
 						as_dict=1,
 					)
@@ -335,6 +341,9 @@ def validate_serial_no(sle, item_det):
 								SerialNoItemError,
 							)
 
+					if sr.work_order and work_order and sr.work_order == work_order:
+						allow_existing_serial_no = True
+
 					if not allow_existing_serial_no and sle.voucher_type in [
 						"Stock Entry",
 						"Purchase Receipt",