Revert sales invoice serial no issues
diff --git a/erpnext/patches.txt b/erpnext/patches.txt
index 13b7299..0cf0f7b 100644
--- a/erpnext/patches.txt
+++ b/erpnext/patches.txt
@@ -413,3 +413,4 @@
 erpnext.patches.v8_1.removed_roles_from_gst_report_non_indian_account
 erpnext.patches.v8_1.gst_fixes #2017-07-06
 erpnext.patches.v8_0.update_production_orders
+erpnext.patches.v8_1.remove_sales_invoice_from_returned_serial_no
\ No newline at end of file