Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\Transform\Rector\ConstFetch\ConstFetchToClassConstFetchRector;
use Rector\Transform\ValueObject\ConstFetchToClassConstFetch;

return RectorConfig::configure()
    ->withConfiguredRule(ConstFetchToClassConstFetchRector::class, [
        new ConstFetchToClassConstFetch('CONTEXT_COURSE', 'course', 'LEVEL'),
    ]);