odoo/addons/account_payment/payment_sequence.xml

<?xml version="1.0"?>
<terp>
    <data noupdate="1">
        <record model="ir.sequence.type" id="seq_type_payment_order" forcecreate="1">
            <field name="name">Payment order</field>
            <field name="code">payment.order</field>
        </record>
        
        <record model="ir.sequence" id="seq_payment_order" forcecreate="1">
            <field name="name">Payment order</field>
            <field name="code">payment.order</field>
            <field name="padding" eval="3"/>
            <field name="prefix">%(year)s/</field>
        </record>
        
        <record model="ir.sequence.type" id="seq_type_payment_line" forcecreate="1">
            <field name="name">Payment Line</field>
            <field name="code">payment.line</field>
        </record>
        
        <record model="ir.sequence" id="seq_payment_line" forcecreate="1">
            <field name="name">Payment Line</field>
            <field name="code">payment.line</field>
            <field name="prefix"></field>
            <field name="padding">3</field>
        </record>
        
    </data>
</terp>