We are maintaining G/0001 for Gold Customers and P/0001 for Platinum Customers, both have different benefits.
Now if a customer upgrades from Gold to Platinum, I want to change the Card No from G series to P series.
Thanks for sharing the idea!
We would suggest you integrate with third-party loyalty solutions which have this type of functionality. Given the current vision & roadmap, we won't be able to accommodate this request.