case 'CREATE_FAILED':
                    if ($questionHelper->ask($input, $output, new ConfirmationQuestion('Stack is in CREATE_FAILED state. Do you want to delete it first? [Y/n]'))) {
                        $output->writeln('Deleting failed stack ' . $stackName);
                        $stack->delete();
                        $observer = new Observer($stack, $stackFactory, $output);