Changing default payment method should not change existing payments
When the client changes their default payment method all existing non paid payments are updated to the newly selected payment method.
This is something that we would like to NOT happen.
We would like a config value where you can set "do not change payment method on existing payments when default method is changed".
The reason is that we do manual handling with a third party system for some payment methods, and that is a problem when method changes on existing payments.