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-rw-r--r--addons/purchase/models/account_invoice.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/addons/purchase/models/account_invoice.py b/addons/purchase/models/account_invoice.py
index 056e3e8e6d5..1490bb9fec9 100644
--- a/addons/purchase/models/account_invoice.py
+++ b/addons/purchase/models/account_invoice.py
@@ -103,7 +103,7 @@ class AccountInvoice(models.Model):
purchase_ids = self.invoice_line_ids.mapped('purchase_id')
if purchase_ids:
self.origin = ', '.join(purchase_ids.mapped('name'))
- self.reference = ', '.join(purchase_ids.filtered('partner_ref').mapped('partner_ref'))
+ self.reference = ', '.join(purchase_ids.filtered('partner_ref').mapped('partner_ref')) or self.reference
@api.onchange('partner_id', 'company_id')
def _onchange_partner_id(self):