SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '1-1' for key 'languagesCandidates'

CandidatesLanguages.php

<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
use Symfony\Component\Validator\Constraints as Assert;

/**
 * CandidatesLanguages
 * @ORM\Table(name="candidates_languages", uniqueConstraints={@ORM\UniqueConstraint(name="languagesCandidates", columns={"language_id", "candidate_id"})}))
 * @ORM\Entity(repositoryClass="AppBundle\Repository\CandidatesLanguagesRepository")
 * @ORM\HasLifecycleCallbacks
 * @UniqueEntity(fields={"language","candidate"}, message="Déja utitlisé")
 */
class CandidatesLanguages {

    /**
     * @var int
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var smallint
     *
     * @ORM\Column(name="level", type="smallint")
     * @Assert\NotBlank (
     *      message = "Ce champ est obligatoire"
     * )
     */
    private $level;

    /**
     * @var \DateTime
     *
     * @ORM\Column(name="created_at", type="datetime")
     */
    private $createdAt;

    /**
     * @var \DateTime
     *
     * @ORM\Column(name="updated_at", type="datetime", nullable=true)
     */
    private $updatedAt;

    /**
     * @var string
     *
     * @ORM\Column(name="token", type="string", length=255)
     */
    private $token;

    /**
     *
     * @ORM\ManyToOne(targetEntity="Candidate", inversedBy="candidatesLanguages")
     * @ORM\JoinColumn(name="candidate_id", referencedColumnName="id", onDelete="CASCADE")     
     * 
     */
    private $candidate;

    /**
     *
     * @ORM\ManyToOne(targetEntity="Language", inversedBy="languagesCandidates")
     * @ORM\JoinColumn(name="language_id", referencedColumnName="id", onDelete="CASCADE")
     * @Assert\NotBlank (
     *      message = "Ce champ est obligatoire"
     * ) 
     */
    private $language;

    /**
     * Get id
     *
     * @return integer 
     */
    public function getId() {
        return $this->id;
    }

    /**
     * Set candidate
     *
     * @param \AppBundle\Entity\Candidate $candidate
     * @return CandidatesLanguages
     */
    public function setCandidate(\AppBundle\Entity\Candidate $candidate = null) {
        $this->candidate = $candidate;

        return $this;
    }

    /**
     * Get candidate
     *
     * @return \AppBundle\Entity\Candidate 
     */
    public function getCandidate() {
        return $this->candidate;
    }

    /**
     * Set language
     *
     * @param \AppBundle\Entity\Language $language
     * @return CandidatesLanguages
     */
    public function setLanguage(\AppBundle\Entity\Language $language = null) {
        $this->language = $language;

        return $this;
    }

    /**
     * Get language
     *
     * @return \AppBundle\Entity\Language 
     */
    public function getLanguage() {
        return $this->language;
    }

    /**
     * Set token
     *
     * @param string $token
     * @return CandidatesLanguages
     */
    public function setToken($token) {
        $this->token = $token;

        return $this;
    }

    /**
     * Get token
     *
     * @return string 
     */
    public function getToken() {
        return $this->token;
    }

    /**
     * @ORM\PrePersist
     * @ORM\PreUpdate
     */
    public function generateToken() {
        if ($this->getToken() == null) {
            $this->setToken(sha1(uniqid(mt_rand(), true)));
        }
    }

    /**
     * Set createdAt
     *
     * @param \DateTime $createdAt
     * @return CandidatesLanguages
     */
    public function setCreatedAt($createdAt) {
        $this->createdAt = $createdAt;

        return $this;
    }

    /**
     * Get createdAt
     *
     * @return \DateTime 
     */
    public function getCreatedAt() {
        return $this->createdAt;
    }

    /**
     * Set updatedAt
     *
     * @param \DateTime $updatedAt
     * @return CandidatesLanguages
     */
    public function setUpdatedAt($updatedAt) {
        $this->updatedAt = $updatedAt;

        return $this;
    }

    /**
     * Get updatedAt
     *
     * @return \DateTime 
     */
    public function getUpdatedAt() {
        return $this->updatedAt;
    }

    /**
     * Now we tell doctrine that before we persist or update we call the updatedTimestamps() function.
     *
     * @ORM\PrePersist
     * @ORM\PreUpdate
     */
    public function updatedTimestamps() {
        $this->setUpdatedAt(new \DateTime(date('Y-m-d H:i:s')));

        if ($this->getCreatedAt() == null) {
            $this->setCreatedAt(new \DateTime(date('Y-m-d H:i:s')));
        }
    }

    /**
     * Set level
     *
     * @param integer $level
     * @return CandidatesLanguages
     */
    public function setLevel($level) {
        $this->level = $level;

        return $this;
    }

    /**
     * Get level
     *
     * @return integer 
     */
    public function getLevel() {
        return $this->level;
    }

}

Controller.php

<?php

namespace AppBundle\Controller\Jobseeker;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Method;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use AppBundle\Entity\Candidate;
use AppBundle\Entity\Formation;
use AppBundle\Entity\Experience;
use AppBundle\Entity\Language;
use AppBundle\Entity\CoverLetter;
use AppBundle\Entity\CandidatesLanguages;
use AppBundle\Entity\CandidatesCompetences;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\Security\Core\Exception\AccessDeniedException;

/**
 * Candidate controller.
 *
 * @Route("/jobseeker")
 */
class JobseekerController extends Controller {
       //CandidatesLanguages
    /**
     * Displays a form to edit an existing CandidatesLanguages entity.
     *
     * @Route("/{token}/edit-language", name="front_candidates_languages_edit")
     * @Method({"GET", "POST"})
     */
    public function editLanguageAction(Request $request, CandidatesLanguages $candidatesLanguages) {
        $edit_language_form = $this->createForm('AppBundle\Form\CandidatesLanguagesType', $candidatesLanguages);
        $edit_language_form->handleRequest($request);
        $em = $this->getDoctrine()->getManager();

        $websiteConfig = $em->getRepository('AppBundle:WebsiteConfig')->getWebsiteConfig();
        $websiteSeoSettings = $em->getRepository('AppBundle:WebsiteSeoSettings')->getWebsiteSeoSetting();
        $candidate = $candidatesLanguages->getCandidate();


        if ($edit_language_form->isSubmitted() && $edit_language_form->isValid()) {
            $em->persist($candidatesLanguages);
            $em->flush();
            // display flash message
            $this->get('session')->getFlashBag()->add(
                    'notice', 'Vos modifications ont été enregistrées avec succès!'
            );

            return $this->redirectToRoute('jobseeker');
        }

        return $this->render('candidateslanguages/editJobseeker.html.twig', array(
                    'websiteConfig' => $websiteConfig,
                    'websiteSeoSettings' => $websiteSeoSettings,
                    'candidate' => $candidate,
                    'candidatesLanguage' => $candidatesLanguages,
                    'edit_language_form' => $edit_language_form->createView(),
        ));
    }

    /**
     * Creates a new CandidatesLanguages entity.
     *
     * @Route("/language/new", name="front_candidate_language_new")
     * @Method({"GET", "POST"})
     */
    public function newCandidatesLanguagesAction(Request $request) {
        //récupérer le candidate connecté
        $account = $this->get('security.context')->getToken()->getUser();
        $candidate = $account->getCandidate();
        $candidatesLanguages = new CandidatesLanguages();
        $form = $this->createForm('AppBundle\Form\CandidatesLanguagesType', $candidatesLanguages);
        $form->handleRequest($request);
        $em = $this->getDoctrine()->getManager();
        $websiteConfig = $em->getRepository('AppBundle:WebsiteConfig')->getWebsiteConfig();
        $websiteSeoSettings = $em->getRepository('AppBundle:WebsiteSeoSettings')->getWebsiteSeoSetting();

        if ($form->isSubmitted() && $form->isValid()) {
            $candidatesLanguages->setCandidate($candidate);
            $em->persist($candidatesLanguages);
            $em->flush();
            // display flash message
            $this->get('session')->getFlashBag()->add(
                    'notice', 'Vos modifications ont été enregistrées avec succès!'
            );
            return $this->redirectToRoute('jobseeker');
        }
        return $this->render('candidateslanguages/newJobseeker.html.twig', array(
                    'websiteConfig' => $websiteConfig,
                    'websiteSeoSettings' => $websiteSeoSettings,
                    'candidate' => $candidate,
                    'candidatesLanguages' => $candidatesLanguages,
                    'form' => $form->createView(),
        ));
    }
}