pos_loyalty_marketing_access/data/ir_sequence_data.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <data noupdate="1">
        <record id="seq_loyalty_voucher_generation_request" model="ir.sequence">
            <field name="name">Voucher Generation Request Sequence</field>
            <field name="code">loyalty.voucher.generation.request</field>
            <field name="prefix">VGR/</field>
            <field name="padding">5</field>
            <field name="number_next">1</field>
            <field name="number_increment">1</field>
            <field name="company_id" eval="False"/>
        </record>
    </data>
</odoo>