Assign only the selected group

-- HikaShop version -- : 4.7.0
-- HikaSerial version -- : 4.0.2
-- Joomla version -- : 4.2.6
-- PHP version -- : 7.3.1
-- Browser(s) name and version -- : Chrome

Hello, when a subscription is confirmed, the system automatically assigns the selected groups to the user but also assigns the Public and Registered groups by default.

It is possible to remove this option and only assign the selected one.

On the other hand, I am doing tests to see how I can do the following.

We need users who have bought x number of licenses of a product to be able to give the generated serials to other users and that they obtain the permissions configured in the subscription.

Specifically, we give access to parts of the web by assigning a user group when buying a product.

I have tried creating subscription plans but they are assigned to the user who buys them and when another uses the generated serials, the groups or the user of the subscription are not changed.

I have tried without subscriptions, only with the serials but when the serials are used by other users from the consume serials menu it does not change their group. Is it possible to use it as a discount coupon?

And finally, when confirming the purchase of x licenses, the group changes to the user who bought them, it is possible to disable this option for a specific user group.

Thnaks.