diff --git a/yuthon_property/models/property_accounts_receivable.py b/yuthon_property/models/property_accounts_receivable.py
index e4b66a219..820399878 100644
--- a/yuthon_property/models/property_accounts_receivable.py
+++ b/yuthon_property/models/property_accounts_receivable.py
@@ -188,7 +188,7 @@ class PropertyAccountsReceivable(models.Model):
     def _onchange_discount_amount(self):
         for record in self:
             if record.discount_amount:
-                record.discount_date = fields.Date.today() - timedelta(hours=8),
+                record.discount_date = fields.Date.today() - timedelta(hours=8)
             else:
                 record.discount_date = False