Symfony Circular Reference Exception with Doctrine tree extension - symfony

Question

I have a Circular Reference Exception because of Doctrine Tree Extension when I'm tring to load my fixture with Alice fixture.
[Doctrine\Common\DataFixtures\Exception\CircularReferenceException]
Graph contains cyclic dependency. An example of this problem would be
the following: Class C has class B as its dependency. Then, class B
has class A has its dependency. Finally, class A has class C as
its dependency.
I have found the same problem here:
https://github.com/doctrine/data-fixtures/issues/232 but the solution does not work for me :( ...
I'm using this version of the doctrine fixtures.
"doctrine/data-fixtures": "1.2.1",
Here is my entity
namespace BaseBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Gedmo\Mapping\Annotation as Gedmo;
use Symfony\Component\Validator\Constraints as Assert;
/**
* BaseCategory
*
* #ORM\Entity()
* #ORM\InheritanceType("JOINED")
* #ORM\DiscriminatorColumn(name="type", type="string")
* #ORM\DiscriminatorMap({
* "article_category" = "AppBundle\Entity\ArticleCategory",
* "page_category" = "AppBundle\Entity\PageCategory",
* })
* #Gedmo\Tree(type="nested")
*/
abstract class BaseCategory
{
use \BaseBundle\Traits\SeoTrait;
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="title", type="string", length=255)
* #Assert\NotBlank()
*/
private $title;
/**
* #var string
*
* #ORM\Column(name="slug", type="string", length=255, unique=true)
* #Gedmo\Slug(fields={"title"})
*/
private $slug;
/**
* #var string
*
* #ORM\Column(name="description", type="text")
*/
private $description;
/**
* #var \DateTime
*
* #ORM\Column(type="datetime")
* #Gedmo\Timestampable(on="create")
*/
private $createdAt;
/**
* #var \DateTime
*
* #ORM\Column(type="datetime")
* #Gedmo\Timestampable(on="update")
*/
private $updatedAt;
/**
* #Gedmo\TreeLeft
* #ORM\Column(type="integer")
*/
private $lft;
/**
* #Gedmo\TreeLevel
* #ORM\Column(type="integer")
*/
private $lvl;
/**
* #Gedmo\TreeRight
* #ORM\Column(type="integer")
*/
private $rgt;
/**
* #Gedmo\TreeRoot
* #ORM\ManyToOne(targetEntity="BaseCategory")
* #ORM\JoinColumn(referencedColumnName="id", onDelete="CASCADE")
*/
private $root;
/**
* #Gedmo\TreeParent
* #ORM\ManyToOne(targetEntity="BaseCategory", inversedBy="children")
* #ORM\JoinColumn(referencedColumnName="id", onDelete="CASCADE")
*/
private $parent;
/**
* #ORM\OneToMany(targetEntity="BaseCategory", mappedBy="parent")
* #ORM\OrderBy({"lft" = "ASC"})
*/
private $children;
/**
* Get id
*
* #return int
*/
public function getId()
{
return $this->id;
}
/**
* Set title
*
* #param string $title
*
* #return BaseCategory
*/
public function setTitle($title)
{
$this->title = $title;
return $this;
}
/**
* Get title
*
* #return string
*/
public function getTitle()
{
return $this->title;
}
/**
* Set slug
*
* #param string $slug
*
* #return BaseCategory
*/
public function setSlug($slug)
{
$this->slug = $slug;
return $this;
}
/**
* Get slug
*
* #return string
*/
public function getSlug()
{
return $this->slug;
}
/**
* Set description
*
* #param string $description
*
* #return BaseCategory
*/
public function setDescription($description)
{
$this->description = $description;
return $this;
}
/**
* Get description
*
* #return string
*/
public function getDescription()
{
return $this->description;
}
/**
* #return \DateTime
*/
public function getCreatedAt()
{
return $this->createdAt;
}
/**
* #return \DateTime
*/
public function getUpdatedAt()
{
return $this->updatedAt;
}
public function getRoot()
{
return $this->root;
}
public function setParent(BaseCategory $parent = null)
{
$this->parent = $parent;
}
public function getParent()
{
return $this->parent;
}
}
Is it normal? How can I fix that?