Backend & systems·Deployment, release and rollback
you cannot go back because the migration already ran, so the only way out is to ship another change quickly.
Roll forward
Also calledfix forward
Fixing a bad release by deploying a newer version rather than reverting. It is necessary when a rollback would be destructive — irreversible migrations, consumed messages, already-published events. It is riskier under incident conditions, so it should be a consequence of the change's shape, not a habit.