server-tools/base_cron_oneshot/data/ir_sequence.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo noupdate="1">

  <record id="seq_oneshot_name" model="ir.sequence">
    <field name="name">Oneshot cron names sequence</field>
    <field name="code">cron.oneshot</field>
    <field name="prefix">Oneshot#</field>
  </record>

</odoo>