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Implications of final classes and final constants


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Per the docs:



Class constants can be redefined by a child class. As of PHP 8.1.0, class constants cannot be redefined by a child class if it is defined as final.


Okay, guess that makes sense.  But what doesn't make sense (at least to me) is why I am getting the following error.  Can anyone explain why I am getting it?

final class DocumentExtension implements QueryCollectionExtensionInterface
    final private const EXEMPT_USER_ROLE = 'ROLE_TENANT_ADMIN';

    private function addWhere(QueryBuilder $queryBuilder, string $resourceClass): bool
        if ($this->security->isGranted(self::EXEMPT_USER_ROLE)) {
            return false;



Fatal error: Private constant App\Doctrine\Extensions\DocumentExtension::EXEMPT_USER_ROLE cannot be final as it is not visible to other classes in /var/www/facdocs/api/src/Doctrine/Extensions/DocumentExtension.php on line 29


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