diff --git a/message.xml b/message.xml
index e9e9740..1f6d734 100644
--- a/message.xml
+++ b/message.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <tryton>
-    <data group="1">
+    <data grouped="1">
         <record model="ir.message" id="msg_weight_required_in_sale_move_event">
             <field name="text">The weigth in the Move Event "%(event)s" is required because it is a move of a sale.</field>
         </record>