clé trop longue laravel code example

Example: [Illuminate\Database\QueryException] SQLSTATE[42000]: Syntax error or access violation: 1071 La clé est trop longue. Longueur maximale: 1000 (SQL: alter table `users` add unique `users_email_unique`(`email`))

<?php
 
namespace App\Providers;
 
use Illuminate\Support\ServiceProvider;
use Illuminate\Support\Facades\Schema;
 
    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        Schema::defaultStringLength(191);
    }