diff --git a/src/Bundle/EventListener/ORMTranslatableListener.php b/src/Bundle/EventListener/ORMTranslatableListener.php
index 5b95d861b..33b505041 100644
--- a/src/Bundle/EventListener/ORMTranslatableListener.php
+++ b/src/Bundle/EventListener/ORMTranslatableListener.php
@@ -183,7 +183,9 @@ private function hasUniqueConstraint(ClassMetadata $metadata, array $columns): b
         }
 
         foreach ($metadata->table['uniqueConstraints'] as $constraint) {
-            if (!array_diff($constraint['columns'], $columns)) {
+            $constraintColumns = $constraint['columns'] ?? $constraint['fields'] ?? [];
+
+            if (!array_diff($constraintColumns, $columns)) {
                 return true;
             }
         }
diff --git a/tests/Bundle/EventListener/ORMTranslatableListenerTest.php b/tests/Bundle/EventListener/ORMTranslatableListenerTest.php
index ec42880e0..f1ef7dc47 100644
--- a/tests/Bundle/EventListener/ORMTranslatableListenerTest.php
+++ b/tests/Bundle/EventListener/ORMTranslatableListenerTest.php
@@ -13,9 +13,15 @@
 
 namespace Bundle\EventListener;
 
+use App\Entity\BookTranslation;
 use App\Entity\BookTranslationInterface;
 use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\ORM\EntityRepository;
+use Doctrine\ORM\Event\LoadClassMetadataEventArgs;
+use Doctrine\ORM\Mapping\ClassMetadata;
+use Doctrine\ORM\Mapping\DefaultNamingStrategy;
+use Doctrine\Persistence\Mapping\RuntimeReflectionService;
+use Sylius\Bundle\ResourceBundle\EventListener\ORMTranslatableListener;
 use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
 
 final class ORMTranslatableListenerTest extends KernelTestCase
@@ -30,8 +36,72 @@ public function testGettingTranslationRepositoryByItsInterface(): void
         );
     }
 
+    public function testItAddsTheTranslatableUniqueConstraintWhenAnotherOneUsesTheFieldsFormat(): void
+    {
+        self::bootKernel();
+
+        $metadata = $this->createTranslationClassMetadata([
+            'uniq_book_translation_title' => ['fields' => ['title']],
+        ]);
+
+        $this->createListener()->loadClassMetadata(
+            new LoadClassMetadataEventArgs($metadata, $this->getEntityManager()),
+        );
+
+        $uniqueConstraints = $metadata->table['uniqueConstraints'];
+
+        $this->assertArrayHasKey('uniq_book_translation_title', $uniqueConstraints);
+        $this->assertArrayHasKey('app_book_translation_uniq_trans', $uniqueConstraints);
+        $this->assertSame(
+            ['translatable_id', 'locale'],
+            $uniqueConstraints['app_book_translation_uniq_trans']['columns'],
+        );
+    }
+
+    public function testItAddsTheTranslatableUniqueConstraintWhenAnotherOneUsesTheLegacyColumnsFormat(): void
+    {
+        self::bootKernel();
+
+        $metadata = $this->createTranslationClassMetadata([
+            'uniq_book_translation_title' => ['columns' => ['title']],
+        ]);
+
+        $this->createListener()->loadClassMetadata(
+            new LoadClassMetadataEventArgs($metadata, $this->getEntityManager()),
+        );
+
+        $uniqueConstraints = $metadata->table['uniqueConstraints'];
+
+        $this->assertArrayHasKey('uniq_book_translation_title', $uniqueConstraints);
+        $this->assertArrayHasKey('app_book_translation_uniq_trans', $uniqueConstraints);
+        $this->assertSame(
+            ['translatable_id', 'locale'],
+            $uniqueConstraints['app_book_translation_uniq_trans']['columns'],
+        );
+    }
+
+    /**
+     * @param array<string, array{columns?: array<string>, fields?: array<string>}> $uniqueConstraints
+     */
+    private function createTranslationClassMetadata(array $uniqueConstraints): ClassMetadata
+    {
+        $metadata = new ClassMetadata(BookTranslation::class, new DefaultNamingStrategy());
+        $metadata->wakeupReflection(new RuntimeReflectionService());
+        $metadata->setPrimaryTable([
+            'name' => 'app_book_translation',
+            'uniqueConstraints' => $uniqueConstraints,
+        ]);
+
+        return $metadata;
+    }
+
+    private function createListener(): ORMTranslatableListener
+    {
+        return self::getContainer()->get(ORMTranslatableListener::class);
+    }
+
     private function getEntityManager(): EntityManagerInterface
     {
-        return $this->getContainer()->get(EntityManagerInterface::class);
+        return self::getContainer()->get(EntityManagerInterface::class);
     }
 }