diff --git a/src/Bundle/ChillThirdPartyBundle/Service/ThirdpartyMergeService.php b/src/Bundle/ChillThirdPartyBundle/Service/ThirdpartyMergeService.php
index 6c0014a2d..4eecb09b4 100644
--- a/src/Bundle/ChillThirdPartyBundle/Service/ThirdpartyMergeService.php
+++ b/src/Bundle/ChillThirdPartyBundle/Service/ThirdpartyMergeService.php
@@ -12,13 +12,18 @@ declare(strict_types=1);
 namespace Chill\ThirdPartyBundle\Service;
 
 use Chill\ThirdPartyBundle\Entity\ThirdParty;
+use Doctrine\DBAL\Exception;
 use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\ORM\Mapping\ClassMetadata;
+use Doctrine\ORM\Mapping\MappingException;
 
-class ThirdpartyMergeService
+readonly class ThirdpartyMergeService
 {
-    public function __construct(private readonly EntityManagerInterface $em) {}
+    public function __construct(private EntityManagerInterface $em) {}
 
+    /**
+     * @throws Exception
+     */
     public function merge(ThirdParty $toKeep, ThirdParty $toDelete): void
     {
         $conn = $this->em->getConnection();
@@ -41,6 +46,9 @@ class ThirdpartyMergeService
         }
     }
 
+    /**
+     * @throws MappingException
+     */
     private function updateReferences(ThirdParty $toKeep, ThirdParty $toDelete): array
     {
         $queries = [];
diff --git a/src/Bundle/ChillThirdPartyBundle/translations/messages.fr.yml b/src/Bundle/ChillThirdPartyBundle/translations/messages.fr.yml
index af184a7de..2c5e8f262 100644
--- a/src/Bundle/ChillThirdPartyBundle/translations/messages.fr.yml
+++ b/src/Bundle/ChillThirdPartyBundle/translations/messages.fr.yml
@@ -134,9 +134,6 @@ is thirdparty: Le demandeur est un tiers
 
 Filter by person's who have a residential address located at a thirdparty of type: Filtrer les usagers qui ont une addresse de résidence chez un tiers
 "Filtered by person's who have a residential address located at a thirdparty of type %thirdparty_type% and valid on %date_calc%": "Uniquement les usagers qui ont une addresse de résidence chez un tiers de catégorie %thirdparty_type% et valide sur la date %date_calc%"
-find duplicate thirdparty: 'Désigner un tier doublon'
-find duplicate thirdparty: 'Désigner un tier doublon'
-
 
 # admin
 admin:
@@ -158,7 +155,6 @@ Contact email: Courrier électronique du contact
 Contact address: Adresse du contact
 Contact profession: Profession du contact
 
-find_thirdparty_duplicate: 'Désigner un tiers doublon'
 thirdparty_duplicate:
     title: Fusionner les tiers doublons
     find: Désigner un tiers doublon