diff --git a/request_document_expense/models/request_document.py b/request_document_expense/models/request_document.py
index 6d307f4..0e98b68 100644
--- a/request_document_expense/models/request_document.py
+++ b/request_document_expense/models/request_document.py
@@ -53,7 +53,7 @@ def _create_expense(self):
 
     def unlink(self):
         # Delete draft sheet
-        self.expense_sheet_ids.unlink()
+        self.expense_sheet_ids.sudo().unlink()
         return super().unlink()
 
     def open_request_document(self):