path: root/addons/purchase_requisition_stock/data/purchase_requisition_stock_demo.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <data noupdate="1">
        <record id="purchase_requisition.requisition1" model="purchase.requisition">
            <field name="warehouse_id" ref="stock.stock_warehouse_shop0"/>
        </record>
    </data>
</odoo>