Association mapping not working

[bbobhel166]

Symfony FOSUserBundle versions: 2.1.2 with sympfony 4.1

Description of the problem including expected versus actual behavior:

I try to create an mapping between a user and a profile class. l don't succès to load data to the form and save it. I got the following message :
The association App\Entity\Profile#user refers to the owning side field App\Entity\User#profile which does not exist.
Everything else is working perfectly (internationalization, surcharges, and so on.)

Steps to reproduce:

1. User.php

/**
    * @ORM\OneToOne(targetEntity="Profile", inversedBy="user")
    * @ORM\JoinColumn(name="profile_id", referencedColumnName="id")
    */
   protected $profile;

/**
    * @return mixed
    */
   public function getProfile()
   {
       return $this->profile;
   }

   /**
    * @param mixed $profile
    */
   public function setProfile($profile): void
   {
       $this->profile = $profile;
   }

2. Profile.php

 /**
     * @ORM\OneToOne(targetEntity="User", mappedBy="profile" )
     */
    protected $user;

/**
     * @return mixed
     */
    public function getUser()
    {
        return $this->user;
    }

    /**
     * @param mixed $user
     */
    public function setUser($user): void
    {
        $this->user = $user;
    }

3. UserFormType.php

class UserFormType extends AbstractType
{

    /**
     * {@inheritdoc}
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('username', null, array('label' => 'form.username', 'translation_domain' => 'FOSUserBundle'))
            ->add('email', EmailType::class, array('label' => 'form.email', 'translation_domain' => 'FOSUserBundle',
                'attr' => array(
                    'readonly' => true,
                ),
                ))
            ->add('profile', ProfileFormType::class, array('label' => false))
        ;
    }

    /**
     * {@inheritdoc}
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'App\Entity\User',
            'csrf_token_id' => 'user',
        ));
    }
    
}

4. ProfileFormType.php

class ProfileFormType extends AbstractType
{

    /**
     * {@inheritdoc}
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('lastname', null, array('label' => 'Lastname', 'translation_domain' => 'profile'))
            ->add('firstname', null, array('label' => 'Firstname', 'translation_domain' => 'profile'))
        ;
    }


    /**
     * {@inheritdoc}
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'App\Entity\Profile',
            'csrf_token_id' => 'profile',
        ));
    }


}

5. ProfileController.php

public function profilepage(UserInterface $user, Request $request, EntityManagerInterface $em, $_locale, $locales)
    {
        /** @var $userManager  */
        $userManager = $this->get('fos_user_manager');
        /** @var $formFactory  */
        $formFactory = $this->get('fos_profile_factory');
        /** @var $dispatcher  */
        $dispatcher = $this->get('fos_event_dispatcher');

       $user = $this->getUser();

        if (!is_object($user) || !$user instanceof UserInterface) {
            throw new AccessDeniedException('This user does not have access to this section.');
        }

        $event = new GetResponseUserEvent($user, $request);
        $dispatcher->dispatch(FOSUserEvents::PROFILE_EDIT_INITIALIZE, $event);

        if (null !== $event->getResponse()) {
            return $event->getResponse();
        }
        
        $form = $formFactory->createForm();
        //$form = $this->createForm(UserFormType::class, $user);
        $form->setData($user);

        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {

            $entityManager = $this->getDoctrine()->getManager();
            
            // actually executes the queries (i.e. the INSERT query)
            $entityManager->flush();

            // user
            $event = new FormEvent($form, $request);
            $dispatcher->dispatch(FOSUserEvents::PROFILE_EDIT_SUCCESS, $event);
            
            $userManager->updateUser($user);

            if (null === $response = $event->getResponse()) {
                $url = $this->generateUrl('page_profile');
                $response = new RedirectResponse($url);
            }

            $dispatcher->dispatch(FOSUserEvents::PROFILE_EDIT_COMPLETED, new FilterUserResponseEvent($user, $request, $response));

            return $response;
        }
        
        return $this->render('@FOSUser/Profile/edit.html.twig', array(
            'form' => $form->createView(),
        ));


    }

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