diff --git a/odex25_project/project_base/models/project_invoice.py b/odex25_project/project_base/models/project_invoice.py
index 9566d2d99..4139617bc 100644
--- a/odex25_project/project_base/models/project_invoice.py
+++ b/odex25_project/project_base/models/project_invoice.py
@@ -53,10 +53,11 @@ class ProjectInvoice(models.Model):
                                                  string="Allowed Internal Users", default=lambda self: self.env.user, domain=[('share', '=', False)])
     allowed_portal_user_ids = fields.Many2many('res.users', 'project_invoice_allowed_portal_users_rel', string="Allowed Portal Users", domain=[('share', '=', True)])
     
-    @api.onchange("project_invline_ids.project_invoice_id")
+    @api.onchange("project_invline_ids")
     def get_price_unit_value_test(self):
         for rec in self.project_invline_ids:
-            rec.price_unit = rec.project_invoice_id.project_id.contract_value_untaxed
+            if rec.price_unit!=0.00:
+                rec.price_unit = rec.project_invoice_id.project_id.contract_value_untaxed
 
     
     @api.depends('invoice_id','invoice_id.invoice_payments_widget','name')