diff --git a/message.xml b/message.xml
index 0b220a4..631c128 100644
--- a/message.xml
+++ b/message.xml
@@ -2,7 +2,7 @@
     <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
     this repository contains the full copyright notices and license terms. -->
     <tryton>
-        <data group="1">
+        <data grouped="1">
             <record model="ir.message" id="msg_change_sale_margin_method">
                 <field name="text">You cannot change the sale margin method because has sales.</field>
             </record>