diff --git a/features/relation.feature b/features/relation.feature
index c172e9b94bc..f52ad0c964c 100644
--- a/features/relation.feature
+++ b/features/relation.feature
@@ -249,16 +249,15 @@ Feature: Relations support
       }
       """
 
-  @wip
   Scenario: Create an existing relation
     When I send a "POST" request to "/relation_embedders" with body:
     """
-      {
-        "anotherRelated": {
-          "symfony": "laravel"
-        }
+    {
+      "anotherRelated": {
+        "symfony": "laravel"
       }
-      """
+    }
+    """
     Then the response status code should be 201
     And the response should be in JSON
     And the header "Content-Type" should be equal to "application/ld+json"
@@ -279,16 +278,31 @@ Feature: Relations support
     }
     """
 
+  Scenario: Post a wrong relation
+    When I send a "POST" request to "/relation_embedders" with body:
+    """
+    {
+      "anotherRelated": {
+        "@id": "/related_dummies/123",
+        "@type": "https://schema.org/Product",
+        "symfony": "phalcon"
+      }
+    }
+    """
+    Then the response status code should be 400
+    And the response should be in JSON
+    And the header "Content-Type" should be equal to "application/ld+json"
+
   Scenario: Update an embedded relation
     When I send a "PUT" request to "/relation_embedders/2" with body:
     """
-      {
-        "anotherRelated": {
-          "@id": "/related_dummies/2",
-          "symfony": "API Platform"
-        }
+    {
+      "anotherRelated": {
+        "@id": "/related_dummies/2",
+        "symfony": "API Platform"
       }
-      """
+    }
+    """
     Then the response status code should be 200
     And the response should be in JSON
     And the header "Content-Type" should be equal to "application/ld+json"
@@ -313,14 +327,14 @@ Feature: Relations support
   Scenario: Update an existing relation
     When I send a "POST" request to "/relation_embedders" with body:
     """
-      {
-        "anotherRelated": {
-          "@id": "/related_dummies/2",
-          "@type": "https://schema.org/Product",
-          "symfony": "phalcon"
-        }
+    {
+    "anotherRelated": {
+        "@id": "/related_dummies/2",
+        "@type": "https://schema.org/Product",
+        "symfony": "phalcon"
       }
-      """
+    }
+    """
     Then the response status code should be 201
     And the response should be in JSON
     And the header "Content-Type" should be equal to "application/ld+json"
diff --git a/src/JsonLd/Serializer/ItemNormalizer.php b/src/JsonLd/Serializer/ItemNormalizer.php
index 801f51f4c9e..5809beeda23 100644
--- a/src/JsonLd/Serializer/ItemNormalizer.php
+++ b/src/JsonLd/Serializer/ItemNormalizer.php
@@ -125,7 +125,7 @@ public function denormalize($data, $class, $format = null, array $context = [])
         $overrideClass = isset($data['@id']) && !isset($context['object_to_populate']);
 
         if ($overrideClass) {
-            $context['object_to_populate'] = $this->iriConverter->getItemFromIri($data['@id']);
+            $context['object_to_populate'] = $this->iriConverter->getItemFromIri($data['@id'], true);
         }
 
         return parent::denormalize($data, $class, $format, $context);
@@ -295,7 +295,7 @@ private function denormalizeRelation(string $resourceClass, string $attributeNam
     {
         if (is_string($value)) {
             try {
-                return $this->iriConverter->getItemFromIri($value);
+                return $this->iriConverter->getItemFromIri($value, true);
             } catch (InvalidArgumentException $e) {
                 // Give a chance to other normalizers (e.g.: DateTimeNormalizer)
             }