How to change the primary client and payments on previous couples sessions in order to create a superbill

I have a couple who has asked for a superbill to submit under partner 2's insurance, however their first 6 sessions have partner 1 listed as the primary client.  I know how to change the primary client for upcoming sessions, but not sure how to get a superbill in the other client's name.


In the past I used Square for credit card payments, so I would simply go back through and delete each previous session and payment, then replace each session with the other partner, and add the payment under their name.


However, I now use Stripe through SP, and I can't delete and re-add the payment to partner 2.


Anyone have advice on how to create a superbill for previous sessions, but have the other partner as the primary client? 


Thanks for any help!