Can I delete part of order in events

Question:
Hi all, we are currently selling tickets with RSVP and seating area. We have sold 50 tickets with 1 order. But they want to cancel 20 tickets from that order. (for the moment I can only cancel an entire order). Is there an option/workaround so I can resell 20 of those 50 already sold tickets? Without having to cancel that order and so making 30 already sold QR-codes invalid to scan.

Product:
Wix Editor

What are you trying to achieve:
Cancel a part of an order in Wix Events

What have you already tried:
I have tried moving them to another ticket type. (not the solution)
I have tried canceling the guests (not the solution)