When you have a model with unique value column and tries seeder your table using a big amout, sometimes the QueryException is thrown, because Faker doesn't know what values was previously generated and the number of combinations is limited.

First you create a file called Cors.php in app/Http/Middleware, then you register the middleware in the app/Http/Kernel.php file. If you want, you can change the default values adding the keys CORS_ALLOW_METHODS, CORS_ALLOW_ORIGINS, CORS_ALLOW_HEADERS and CORS_MAX_AGE to your .env file. Simple as that! This class is based on spatie/laravel-cors package.