diff --git a/account_reconcile_oca/models/account_bank_statement_line.py b/account_reconcile_oca/models/account_bank_statement_line.py
index c8285a0a..bf1fb530 100644
--- a/account_reconcile_oca/models/account_bank_statement_line.py
+++ b/account_reconcile_oca/models/account_bank_statement_line.py
@@ -1020,7 +1020,7 @@ class AccountBankStatementLine(models.Model):
                     suspense_lines,
                     _other_lines,
                 ) = st_line._seek_for_lines()
-                line_vals = {"partner_id": st_line.partner_id}
+                line_vals = {"partner_id": st_line.partner_id.id}
                 line_ids_commands = [(1, liquidity_lines.id, line_vals)]
                 if suspense_lines:
                     line_ids_commands.append((1, suspense_lines.id, line_vals))