Forced cancellation of an invoice in odoo via server action

nullification_of_an_invoice.py

for rec in records:
  move_id = rec.move_id
  
  # move_id.line_ids.remove_move_reconcile()
  update_posted_state = rec.journal_id.update_posted
  rec.journal_id.write({'update_posted': True})
  # move_id.button_cancel()
  # This action will delete any move_id that we have
  rec.action_cancel()
  rec.write({'state': 'cancel'})
  rec.write({'move_id': False})
  if move_id.exists():
      move_id.unlink()
  # Uncomment this if you want to delete the invoice
  #if rec:
  #    rec.unlink()
  rec.journal_id.write({'update_posted': update_posted_state})