diff --git a/addons/sale_stock/models/sale_order.py b/addons/sale_stock/models/sale_order.py
index d7d41949..8101e353 100644
--- a/addons/sale_stock/models/sale_order.py
+++ b/addons/sale_stock/models/sale_order.py
@@ -5,7 +5,7 @@ from datetime import datetime, timedelta
 
 from flectra import api, fields, models, _
 from flectra.tools import DEFAULT_SERVER_DATETIME_FORMAT, float_compare
-from flectra.exceptions import UserError, ValidationError
+from flectra.exceptions import UserError
 
 
 class SaleOrder(models.Model):