Как загрузить более 500 записей в сидере?

class ScheduleDemoSeeder extends Seeder
{
  public function run()
    {
    	if(DB::table('schedule')->count('*') > 0)
		{
			DB::table('schedule')->truncate();
			$this->command->info('Schedule table was cleared');
		}
    	$week = date("W");
		foreach (\App\Models\Group::all() as $item) {
			$this->generateScheduleOnWeek($week, $item);
    	}
    	foreach (\App\Models\Group::all() as $item) {
			$this->generateScheduleOnWeek($week+1, $item);
    	}

    }

    public function generateScheduleOnWeek($week, \App\Models\Group $group)
	{
		try
		{
			DB::beginTransaction();
			for($i=1;$i<=6;$i++)
			{
				for ($b = 1; $b<=4;$b++)
				{
					$t = $group->subgroups()->get()->random();
					\App\Models\Schedule::create([
						'week' => $week,
						'day_of_week' => $i,
						'city_id' => 1,
						'group_id' => $group->id,
						'corps_id' => $group->corps_id,
						'discipline_id' => $t->discipline_id,
						'teacher_id' => $t->teacher_id,
						'rooms'  => rand(10,350),
						'lesson_priority' => $b,
					]);
				}
			}
			DB::commit();
		}
		catch (\Exception $exception)
		{
			DB::rollBack();
		}