Hi,

You can create multiple sequences for a model.

What you have to do is that,

In the XML file,

<record id="seq_student_application1" model="ir.sequence">
    <field name="name">Student Application1</field>
    <field name="code">education_application1</field>
    <field name="prefix">SA1</field>
    <field name="padding">3</field>
    <field name="company_id" eval="False"/>
</record>

<record id="seq_student_application2" model="ir.sequence">
    <field name="name">Student Application2</field>
    <field name="code">education_application2</field>
    <field name="prefix">SA2</field>
    <field name="padding">3</field>
    <field name="company_id" eval="False"/>
</record>

Then in the model, you can super the create method and assign the values for the field,

@api.model
def create(self, vals):
    vals['application_no1'] = self.env['ir.sequence'].next_by_code('education_application1') or _('New')
    vals['application_no2'] = self.env['ir.sequence'].next_by_code('education_application2') or _('New')
    res = super(StudentApplication, self).create(vals)
    return res

Fields added in the model,

application_no1 = fields.Char(string='Application  No', required=True, copy=False, readonly=True,
                   index=True, default=lambda self: _('New'))
application_no2 = fields.Char(string='Application  No2', required=True, copy=False, readonly=True,
                   index=True, default=lambda self: _('New'))

Thanks