diff --git a/odex25_project/project_base/models/project_invoice.py b/odex25_project/project_base/models/project_invoice.py
index ddcc55295..e779da546 100644
--- a/odex25_project/project_base/models/project_invoice.py
+++ b/odex25_project/project_base/models/project_invoice.py
@@ -55,8 +55,8 @@ class ProjectInvoice(models.Model):
     
     @api.onchange("project_invline_ids")
     def get_price_unit_value_test(self):
-        for rec in self:
-            rec.price_unit = rec.project_invoice_id.project_id.contract_value_untaxed
+        for rec in self.project_invline_ids:
+            rec.price_unit = rec.project_id.contract_value_untaxed
 
     
     @api.depends('invoice_id','invoice_id.invoice_payments_widget','name')