Laravel migrate rollback 报错

➜ /Library/WebServer/Documents/laravel >php artisan migrate:rollback
PHP Fatal error: Class 'AddAuthors' not found in /Library/WebServer/Documents/laravel/vendor/laravel/framework/src/Illuminate/Database/Migrations/Migrator.php on line 297
PHP Stack trace:
PHP 1. {main}() /Library/WebServer/Documents/laravel/artisan:0
PHP 2. Symfony\Component\Console\Application->run() /Library/WebServer/Documents/laravel/artisan:59
PHP 3. Symfony\Component\Console\Application->doRun() /Library/WebServer/Documents/laravel/vendor/symfony/console/Symfony/Component/Console/Application.php:121
PHP 4. Symfony\Component\Console\Application->doRunCommand() /Library/WebServer/Documents/laravel/vendor/symfony/console/Symfony/Component/Console/Application.php:191
PHP 5. Illuminate\Console\Command->run() /Library/WebServer/Documents/laravel/vendor/symfony/console/Symfony/Component/Console/Application.php:892
PHP 6. Symfony\Component\Console\Command\Command->run() /Library/WebServer/Documents/laravel/vendor/laravel/framework/src/Illuminate/Console/Command.php:96
PHP 7. Illuminate\Console\Command->execute() /Library/WebServer/Documents/laravel/vendor/symfony/console/Symfony/Component/Console/Command/Command.php:241
PHP 8. Illuminate\Database\Console\Migrations\RollbackCommand->fire() /Library/WebServer/Documents/laravel/vendor/laravel/framework/src/Illuminate/Console/Command.php:108
PHP 9. Illuminate\Database\Migrations\Migrator->rollback() /Library/WebServer/Documents/laravel/vendor/laravel/framework/src/Illuminate/Database/Console/Migrations/RollbackCommand.php:54
PHP 10. Illuminate\Database\Migrations\Migrator->runDown() /Library/WebServer/Documents/laravel/vendor/laravel/framework/src/Illuminate/Database/Migrations/Migrator.php:170
PHP 11. Illuminate\Database\Migrations\Migrator->resolve() /Library/WebServer/Documents/laravel/vendor/laravel/framework/src/Illuminate/Database/Migrations/Migrator.php:190
{"error":{"type":"Symfony\\Component\\Debug\\Exception\\FatalErrorException","message":"Class 'AddAuthors' not found","file":"\/Library\/WebServer\/Documents\/laravel\/vendor\/laravel\/framework\/src\/Illuminate\/Database\/Migrations\/Migrator.php","line":297}}{"error":{"type":"Symfony\\Component\\Debug\\Exception\\FatalErrorException","message":"Class 'AddAuthors' not found","file":"\/Library\/WebServer\/Documents\/laravel\/vendor\/laravel\/framework\/src\/Illuminate\/Database\/Migrations\/Migrator.php","line":297}}%