Entity/Category.php

#[ORM\Entity]
class Category
{
    #[ORM\Id]
    #[ORM\Column(type: 'integer')]
    #[ORM\GeneratedValue(strategy: 'AUTO')]
    private int $id;

    #[ORM\ManyToOne(targetEntity: 'Category', fetch: 'EAGER')]
    #[ORM\JoinColumn(name: 'root_id', referencedColumnName: 'id', onDelete: 'CASCADE')]
    private ?Category $root = null;
}

$qb = $this->createQueryBuilder('content')
            ->join('content.category', 'category')
            ->join('category.root', 'categoryRoot', Expr\Join::WITH, 'categoryRoot = :root')
            ->setParameter('root', $host->getCategory());

$query = $qb->getQuery();
$query->setFetchMode(Category::class, 'categoryRoot', ClassMetadata::FETCH_LAZY);

Doctrine\ORM\Query\QueryException

Associations with fetch-mode=EAGER may not be using WITH conditions in
             "[App\Entity\Category]"

if ($relation->fetch === ClassMetadata::FETCH_EAGER && $condExpr !== null) {
            throw QueryException::eagerFetchJoinWithNotAllowed($assoc->sourceEntity, $assoc->fieldName);
}