diff --git a/erpnext/crm/doctype/opportunity/opportunity.py b/erpnext/crm/doctype/opportunity/opportunity.py
index 6a5fead..2a8d65f 100644
--- a/erpnext/crm/doctype/opportunity/opportunity.py
+++ b/erpnext/crm/doctype/opportunity/opportunity.py
@@ -59,7 +59,7 @@
 			if not self.get(field) and frappe.db.field_exists(self.opportunity_from, field):
 				try:
 					value = frappe.db.get_value(self.opportunity_from, self.party_name, field)
-					self.db_set(field, value)
+					self.set(field, value)
 				except Exception:
 					continue