For information, changing invoice after they has been sent or after be accessible from customer is forbidden is mostly countries.
Legal process is to cancel invoice, do a credit slip and create a new invoice using credit slip (with new invoice number)
Same for changing customer address on invoice for example. It’s forbidden by laws.
So in you case you should cancel order and create credit slip then create a new order using credit slip, finally a new invoice will be generated.
Some legal issues with invoicing in Prestashop can be follow here : https://github.com/PrestaShop/PrestaShop/issues/13822