错误 preg_match (): Compilation failed

if (preg_match('/([\w\.\-_]+)?\w+\@[\w-_]+(\.\w+){1,}/s', $user['description'])) {
    preg_match('/([\w\.\-_]+)?\w+\@[\w-_]+(\.\w+){1,}/s', $user['description'], $matches);
    $user['email'] = $matches['0'];
}

错误提示：

1. exception: “ErrorException”
2. file: “/Applications/MAMP/htdocs/demo.com/app/GuzzleBuilder/ScrapyBuilder.php”
3. line: 90
4. message: “preg_match(): Compilation failed: invalid range in character class at offset 21”

在用laravel 7
请问一下有谁知道解决吗？