We have the same problem but with additional contextual details.
We have a credit card connected to the repo.
We need to transfer the repo. to the client.
The client will archive the service associated with the repo. and does not want to add a new credit card to it at this moment. Especially since it still in our control.
We can't delete the repo. since the service it supports won't work without it. And it might be brought back to active development by the client later.
We were on a Medium plan while developing, now on Free plan for archiving purposes. No payment details needed.
In summary: we can't keep our credit card connected after transferring the repo. to the client and we can't delete the repo.
Can you please look at our case and manually delete the credit card?
After you transfer the ownership of the repository we will automatically remove the configured credit card for security reasons. Therefore the new owner will need to update their credit card information if they want to keep their plan.
It would be great to update your documentation as it states there that you should "delete your credit card details" before transferring ownership: Manage Users - Guides - Prismic which contradicts this answer