[IMP] mrp: Fix traceback when creating alert

addons/mrp/views/mrp_message_views.xml

@@ -53,6 +53,7 @@
             <form string="Inventory Message">
                 <group>
                     <group>
+                        <field name="product_id" invisible="1"/>
                         <field name="bom_id"/>
                         <field name="routing_id"/>
                     </group>