diff --git a/erpnext/manufacturing/doctype/work_order/work_order.py b/erpnext/manufacturing/doctype/work_order/work_order.py
index 057c49949ec..218ab2f2bf8 100644
--- a/erpnext/manufacturing/doctype/work_order/work_order.py
+++ b/erpnext/manufacturing/doctype/work_order/work_order.py
@@ -520,7 +520,6 @@ class WorkOrder(Document):
 	def delete_auto_created_batch_and_serial_no(self):
 		for row in frappe.get_all("Serial No", filters={"work_order": self.name}):
 			frappe.delete_doc("Serial No", row.name)
-			self.db_set("serial_no", "")
 
 		for row in frappe.get_all("Batch", filters={"reference_name": self.name}):
 			frappe.delete_doc("Batch", row.name)