strprfcrm/database/seeders/BrigadierSeeder.php

<?php

namespace Database\Seeders;

use App\Models\Brigadier;
use Illuminate\Database\Console\Seeds\WithoutModelEvents;
use Illuminate\Database\Seeder;

class BrigadierSeeder extends Seeder
{
    /**
     * Run the database seeds.
     */
    public function run(): void
    {
        Brigadier::updateOrCreate(['id' => 1], ['name' => 'Не выбран']);
        if(Brigadier::query()->get()->count() == 1) {
            Brigadier::updateOrCreate(['name' => 'Ленин']);
            Brigadier::updateOrCreate(['name' => 'Сталин']);
            Brigadier::updateOrCreate(['name' => 'Брежнев']);
            Brigadier::updateOrCreate(['name' => 'Хрущёв']);
        }
    }
}