continueUpdateRollback

Continues rolling back a stack from UPDATE_ROLLBACK_FAILED to UPDATE_ROLLBACK_COMPLETE state. Depending on the cause of the failure, you can manually fix the error and continue the rollback. By continuing the rollback, you can return your stack to a working state (the UPDATE_ROLLBACK_COMPLETE state) and then try to update the stack again.

A stack enters the UPDATE_ROLLBACK_FAILED state when CloudFormation can't roll back all changes after a failed stack update. For example, this might occur when a stack attempts to roll back to an old database that was deleted outside of CloudFormation. Because CloudFormation doesn't know the instance was deleted, it assumes the instance still exists and attempts to roll back to it, causing the update rollback to fail.

For more information, see Continue rolling back an update in the CloudFormation User Guide. For information for troubleshooting a failed update rollback, see Update rollback failed.