Problem with route model binding

Hello everyone!

I have a posts table which has the following structure:

Schema::create('posts', function (Blueprint $table) {
    $table->id();
    $table->string('title');
    $table->string('slug')->unique();
    $table->foreignId('author_id');
    $table->text('excerpt');
    $table->text('content');
    $table->timestamps();
});

which is currently migrated successfully. I'm trying to do the following in my `routes/web.php:

Route::get('/posts/{post:slug}', function (Post $post) {

    return view('post', [
        'post' => Post::firstOrFail($post)
    ]);
})->name('post');

but when I try to access 127.0.0.1:8000/posts/my-first-post I'm getting an error:

SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '.`000000Z","updated_at"?}` from `posts` limit 1' at line 1

What on earth?