Hello. I have the improvement for you.

[dnkhack]

1. Custom order can be implemented without Overrides.
   Overrides is bad practice, it is a last point if developers have not other way.
2. And you can easily change all old orders to new syntax.

1). use hook
` public function hookActionValidateOrder($params)
{
if (!$this->active)
return false;

    $new_ref = $this->generateReference($params['order']); // your generator function

    $order_payment = new OrderPayment();
    $transaction_id = $order_payment->getByOrderReference($params['order']->reference);
    
    if(count($transaction_id)){
        foreach($transaction_id as $transaction){
            $transaction->order_reference = $new_ref;
            $transaction->update();
        }
    }

    $params['order']->reference = $new_ref;
    $params['order']->update();
}

`

2). update in database
public function updateAllOrders_to_my_synax () { $sql = "SELECT id_order FROM "._DB_PREFIX_."orders ORDER BY id_order ASC"; foreach (Db::getInstance()->executeS($sql) as $row) { $order = new Order((int) $row['id_order']); $ref = (string) $this->generateReference($order); Db::getInstance()->execute("UPDATE "._DB_PREFIX_."orders SET reference = '".pSQL($ref)."' WHERE id_order = ".$order->id); } }

Have Good day and experience :)