diff --git a/erpnext/stock/doctype/stock_settings/stock_settings.py b/erpnext/stock/doctype/stock_settings/stock_settings.py
index d0ef39aceb04f847a2c7cd0ac07cb348de2fe79e..c21951c47186cd79bbb958d96094518b66c2f642 100644
--- a/erpnext/stock/doctype/stock_settings/stock_settings.py
+++ b/erpnext/stock/doctype/stock_settings/stock_settings.py
@@ -120,7 +120,11 @@ class StockSettings(Document):
 				)
 
 	def cant_change_valuation_method(self):
-		previous_valuation_method = self.get_doc_before_save().get("valuation_method")
+		doc_before_save = self.get_doc_before_save()
+		if not doc_before_save:
+			return
+
+		previous_valuation_method = doc_before_save.get("valuation_method")
 
 		if previous_valuation_method and previous_valuation_method != self.valuation_method:
 			# check if there are any stock ledger entries against items