PHP：laravel自定义Model报错：$table must not be defined/$table must be string

{
    "require": {
        "php": "^8.0.2",
        "laravel/framework": "^9.19"
    }
}

class ArticleModel extends BaseModel 
{
    protected string $table = 'tb_article';
}

$table must not be defined (as in class Illuminate\\Database\\Eloquent\\Model)
$table must be string (as in class Illuminate\\Database\\Eloquent\\Model)

class ArticleModel extends BaseModel 
{
    protected $table = 'tb_article';
}