Like the other poster said, roll back should be the right answer the vast majority of the time. But it's also important to recognize that roll forward should be a replacement for the deployment you decided not to roll back, not a parallel deployment through another system.

I won't say never, but a situation where the right answer to avoid a rollback (that it sounds like was technically fine to do, just undesirable from a security/business perspective) is a parallel deployment through a radioactive, global blast radius, near instantaneous deployment system that is under intense scrutiny after another recent outage should be about as probable as a bowl of petunias in orbit