I'm trying extend inventory detailed operation with 1 more field.

To do this in Operations I can just create a record 

<data>
    <record id="extendet_inventory" model="ir.ui.view">
        <field name="name">Inventory</field>
        <field name="model">stock.picking</field>
        <field name="inherit_id" ref="stock.view_picking_form"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='move_ids_without_package']/tree/field[@name='product_id']" position="before">
                <field name="unit_name"/>
            </xpath>
        </field>
    </record>
</data>


But when I changing 
expr="//field[@name='move_ids_without_package']

to 

expr="//field[@name='move_line_ids_without_package']

and want work with Detailed operations Odoo shows error:
Element '<xpath expr="//field[@name='move_line_ids_without_package']/tree/field[@name='product_id']">' cannot be located in parent viewElement '<xpath expr="//field[@name='move_line_ids_without_package']/tree/field[@name='product_id']">' cannot be located in parent view
How can I write correct path to add 1 more field to this tree?