diff --git a/yuthon_property_approval/wizard/binding_information_wizard.py b/yuthon_property_approval/wizard/binding_information_wizard.py
index 08dc2dc8c..d5314f246 100644
--- a/yuthon_property_approval/wizard/binding_information_wizard.py
+++ b/yuthon_property_approval/wizard/binding_information_wizard.py
@@ -119,7 +119,7 @@ class BindingInformationWizard(models.Model):
                                                                     ('your_own_unit', '=',
                                                                      self.bank_id.your_own_unit)])
             for bank_id in bank_ids:
-                first_contract = bank_id.contract_ids[0]
+                first_contract = self.contract_ids[0]
                 lessee_id = first_contract.lessee_id
                 bank_line = self.env['property.bank.line'].search(
                     [('tenant_id', '=', lessee_id.id)],