Merge pull request frappe#43818 from frappe/mergify/bp/version-15/pr-…

…43817

fix: Unnecessary validation for non-deferred sales invoices (frappe#43816)

erpnext/accounts/doctype/sales_invoice/sales_invoice.py

@@ -297,8 +297,11 @@ def validate(self):
 			self.update_current_stock()
 			self.validate_delivery_note()
 
+		is_deferred_invoice = any(d.get("enable_deferred_revenue") for d in self.get("items"))
+
 		# validate service stop date to lie in between start and end date
-		validate_service_stop_date(self)
+		if is_deferred_invoice:
+			validate_service_stop_date(self)
 
 		if not self.is_opening:
 			self.is_opening = "No"