diff --git a/l10n_es_aeat_mod349/models/mod349.py b/l10n_es_aeat_mod349/models/mod349.py
index 7eea444df53..cecac00690c 100644
--- a/l10n_es_aeat_mod349/models/mod349.py
+++ b/l10n_es_aeat_mod349/models/mod349.py
@@ -203,7 +203,6 @@ def _create_349_refund_records(self):
             groups.setdefault(key, refund_detail_obj)
             groups[key] += refund_detail
         for (origin_invoice, op_key), refund_details in groups.items():
-            refund_details = groups[origin_invoice]
             refund_detail = first(refund_details)
             move_line = refund_detail.refund_line_id
             partner = move_line.partner_id