Hi , I'm trying to change the state of a created invoice from 'draft' to 'posted' using the Web APIs (Python) by referring to this documentation : https://www.odoo.com/documentation/13.0/webservices/odoo.html

I'm updating the invoice as follows :

@app.route('/makeInvoicePosted')

def makeInvoicePosted(invoice_id):

    invoice_ids = []

    invoice_ids.append(invoice_id)

    common = xmlrpc.client.ServerProxy('{}/xmlrpc/2/common'.format(url))

    print(common)

    uid = common.authenticate(db, username, password, {})

    print("makeInvoicePosted : Odoo Admin User Id : ", uid)

    models = xmlrpc.client.ServerProxy('{}/xmlrpc/2/object'.format(url))

models.execute_kw(db, uid, password, 'account.move', 'write', [[invoice_id], {'state':"posted"}])

But I'm getting this error : odoo.exceptions.ValidationError: (\'Posted journal entry must have an unique sequence number per company.\', None)\n'

What could be causing this ? is there something missing in the request?

Thanks in advance!