Order admin notification shows order code instead of numeric order ID

-- Browser(s) name and version -- : Chrome 156.0

Hello Nicolas,
After updating to HikaShop Business 6.7.1, I've noticed a change in the order notification emails sent to the administrator.
Previously, the first lines of the email included the numeric order ID, for example:
"Hello,
You can access the order details directly by clicking on the link below after logging into your administration: 92860."
Now, after the update, the same email displays an alphanumeric order code instead, for example: H9Q2N8K60.
This is a problem for us because we use the numeric order ID extensively in our daily order management and internal processes.
My questions are:

1. Is this an intentional change introduced in the latest version, or could it be a bug?
2. Is there a way to restore the numeric order ID in the administrator notification email, as it appeared before?
3. Could both identifiers be displayed in the email, without changing the existing order numbering configuration?

We would prefer a solution that doesn't require modifying HikaShop core files and that will remain compatible with future updates.
Thank you for your help.
Best regards,
José Ángel
Hermanos Galiano
www.hermanosgaliano.es