tra_backend/intercompany_transaction_ept/views/stock_picking_views.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <data>
	<record id="inter_company_transfer_ept_pickings_form_view" model="ir.ui.view">
            <field name="name">inter.company.transfer.ept.pickings.view.form</field>
            <field name="model">stock.picking</field>
            <field name="inherit_id" ref="stock.view_picking_form"/>
            <field name="arch" type="xml">
                <data>
                    <field name="location_id" position="after">
                    	<field name="intercompany_transfer_id" attrs="{'invisible':[('intercompany_transfer_id','=',False)]}" readonly="1"/>
                    </field>
                </data>
            </field>
        </record>
	</data>
</odoo>