diff --git a/purchase_advance_payment/wizard/purchase_advance_payment_wizard.py b/purchase_advance_payment/wizard/purchase_advance_payment_wizard.py
index 0ef7fdc4fbd..ceac37d3c8b 100644
--- a/purchase_advance_payment/wizard/purchase_advance_payment_wizard.py
+++ b/purchase_advance_payment/wizard/purchase_advance_payment_wizard.py
@@ -93,7 +93,7 @@ def onchange_date(self):
         self.currency_amount = amount_advance
 
     def _prepare_payment_vals(self, purchase):
-        partner_id = purchase.partner_id.id
+        partner_id = purchase.partner_id.commercial_partner_id.id
         return {
             "date": self.date,
             "amount": self.amount_advance,