Allowed memory size of 536870912 bytes exhausted

I just upgraded my homestead to the latest version and now a script I've been running successfully is now getting the error:

PHP Fatal error:  Allowed memory size of 536870912 bytes exhausted (tried to allocate 20480 bytes) in /home/vagrant/Code/app1/vendor/laravel/framework/src/Illuminate/Database/Connection.php on line 458


  [Symfony\Component\Debug\Exception\FatalErrorException]
  Allowed memory size of 536870912 bytes exhausted (tried to allocate 20480 bytes)

The previous version of homestead worked fine and my production server works fine. Why am I suddenly getting this error?

I know I can just up the memory limit of PHP but I am trying to avoid that if I can because it was working fine before. Current memory limit is set to 512MB.

Here is the script I'm running, is there anything wrong with it?

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;

use App\Metric;
use App\Location;
use League\Csv\Reader;
use League\Csv\Statement;

class ImportMetrics extends Command
{
    protected $signature = 'import:metrics';

    protected $description = 'Import metrics from CSV';

    public function __construct()
    {
        parent::__construct();
    }

    public function handle()
    {
        if (file_exists($path = storage_path('app/import.csv'))) {
            Metric::truncate();

            $locations = Location::all();

            $csv = Reader::createFromPath($path);
            $records = (new Statement())->offset(1)->process($csv);

            $bar = $this->output->createProgressBar(count($records));

            foreach ($records as $record) {
                $record = array_map('filter', $record);

                $metric = new Metric([
                    'product_code' => $record[7],
                    'product_group' => $record[3],
                    'product_subgroup' => $record[4],
                    'product_class' => $record[5],
                    'product_subclass' => $record[6],
                    'unit' => $record[11],
                    'previous_quantity' => number($record[16]),
                    'previous_mt' => number($record[39]),
                    'previous_50lb' => number($record[37]),
                    'previous_sales' => number($record[15]),
                    'previous_gp' => number($record[36]),
                    'current_quantity' => number($record[10]),
                    'current_mt' => number($record[40]),
                    'current_50lb' => number($record[38]),
                    'current_sales' => number($record[9]),
                    'current_gp' => number($record[30]),
                ]);

                $metric->location()->associate(
                    $locations->where('code', $record[0])->first()
                );

                $metric->save();

                $bar->advance();
            }

            $bar->finish();
        }
    }
}