diff --git a/models/account.py b/models/account.py
index 12f076b7d922119f2db511c3f4e5c2b751b263fa..b4d7895125acbb6816ef2e53de2352dcb3727e37 100644
--- a/models/account.py
+++ b/models/account.py
@@ -10,9 +10,6 @@ class AccountInvoice(models.Model):
     # ------------------------------------------------------
     # Fields declaration
     # ------------------------------------------------------
-    user_second_id = fields.Many2one(
-        comodel_name='res.users',
-        string='Spécialiste')
     user_second_ids = fields.Many2many(
         comodel_name='res.users',
         column1='invoice_id',
diff --git a/models/sale.py b/models/sale.py
index 2cb962cea66223db07bc14179de9dfb82f153a61..ad43f33cb74f0c72b7d1b039afd2fef7c10d1aef 100644
--- a/models/sale.py
+++ b/models/sale.py
@@ -10,9 +10,6 @@ class SaleOrder(models.Model):
     # ------------------------------------------------------
     # Fields declaration
     # ------------------------------------------------------
-    user_second_id = fields.Many2one(
-        comodel_name='res.users',
-        string='Spécialiste')
     user_second_ids = fields.Many2many(
         comodel_name='res.users',
         column1='order_id',