diff --git a/erpnext/stock/doctype/item/item.py b/erpnext/stock/doctype/item/item.py
index 5a35e81..0d5ffc1 100644
--- a/erpnext/stock/doctype/item/item.py
+++ b/erpnext/stock/doctype/item/item.py
@@ -633,9 +633,9 @@
 
 	def validate_stock_exists_for_template_item(self):
 		if self.stock_ledger_created():
-			if ((self._doc_before_save
-				and self._doc_before_save.has_variants != self.has_variants)
-				or self.variant_of != self._doc_before_save.variant_of):
+			if (self._doc_before_save
+				and (self._doc_before_save.has_variants != self.has_variants
+				or self._doc_before_save.variant_of != self.variant_of)):
 				frappe.throw(_("Cannot change Variant properties after stock transction. You will have to make a new Item to do this.").format(self.name),
 					StockExistsForTemplate)