baoshi-was/database/seeds/ConfigurationSeeder.php

<?php

use Illuminate\Database\Seeder;
use App\Configuration;
class ConfigurationSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        $configurations = factory(Configuration::class)->times(100)->make()->toArray();
        Configuration::query()->insert($configurations);
    }
}