diff --git a/src/JsonApi/JsonSchema/SchemaFactory.php b/src/JsonApi/JsonSchema/SchemaFactory.php
index adf7594219e..e40ff6a2868 100644
--- a/src/JsonApi/JsonSchema/SchemaFactory.php
+++ b/src/JsonApi/JsonSchema/SchemaFactory.php
@@ -207,6 +207,7 @@ private function buildDefinitionPropertiesSchema(string $key, string $className,
                     'type' => 'array',
                     'items' => self::RELATION_PROPS,
                 ];
+                continue;
             }
             if ('id' === $propertyName) {
                 $attributes['_id'] = $property;
diff --git a/tests/Fixtures/TestBundle/ApiResource/Animal.php b/tests/Fixtures/TestBundle/ApiResource/Animal.php
new file mode 100644
index 00000000000..6d9d3056db2
--- /dev/null
+++ b/tests/Fixtures/TestBundle/ApiResource/Animal.php
@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ApiPlatform\Tests\Fixtures\TestBundle\ApiResource;
+
+use ApiPlatform\Metadata\ApiProperty;
+use ApiPlatform\Metadata\ApiResource;
+
+#[ApiResource]
+class Animal
+{
+    private ?int $id = null;
+
+    #[ApiProperty(required: true)]
+    private ?Species $species = null;
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getSpecies(): ?Species
+    {
+        return $this->species;
+    }
+
+    public function setSpecies(?Species $species): static
+    {
+        $this->species = $species;
+
+        return $this;
+    }
+}
diff --git a/tests/Fixtures/TestBundle/ApiResource/AnimalObservation.php b/tests/Fixtures/TestBundle/ApiResource/AnimalObservation.php
new file mode 100644
index 00000000000..8c2ce7a4a9d
--- /dev/null
+++ b/tests/Fixtures/TestBundle/ApiResource/AnimalObservation.php
@@ -0,0 +1,60 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ApiPlatform\Tests\Fixtures\TestBundle\ApiResource;
+
+use ApiPlatform\Metadata\ApiProperty;
+use ApiPlatform\Metadata\ApiResource;
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
+
+#[ApiResource]
+class AnimalObservation
+{
+    private ?int $id = null;
+
+    #[ApiProperty(required: true)]
+    private Collection $individuals;
+
+    public function __construct()
+    {
+        $this->individuals = new ArrayCollection();
+    }
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    /** @return Collection<int, Animal> */
+    public function getIndividuals(): Collection
+    {
+        return $this->individuals;
+    }
+
+    public function addIndividual(Animal $individual): static
+    {
+        if (!$this->individuals->contains($individual)) {
+            $this->individuals->add($individual);
+        }
+
+        return $this;
+    }
+
+    public function removeIndividual(Animal $individual): static
+    {
+        $this->individuals->removeElement($individual);
+
+        return $this;
+    }
+}
diff --git a/tests/Fixtures/TestBundle/ApiResource/Species.php b/tests/Fixtures/TestBundle/ApiResource/Species.php
new file mode 100644
index 00000000000..54a184646e6
--- /dev/null
+++ b/tests/Fixtures/TestBundle/ApiResource/Species.php
@@ -0,0 +1,38 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ApiPlatform\Tests\Fixtures\TestBundle\ApiResource;
+
+use ApiPlatform\Metadata\ApiProperty;
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\Get;
+use ApiPlatform\Metadata\GetCollection;
+
+#[ApiResource]
+#[GetCollection(
+    uriTemplate: '/species',
+)]
+#[Get(
+    uriTemplate: '/species/{key}',
+)]
+final class Species
+{
+    #[ApiProperty(identifier: true)]
+    public ?int $key = null;
+    public ?string $kingdom = null;
+    public ?string $phylum = null;
+    public ?string $order = null;
+    public ?string $family = null;
+    public ?string $genus = null;
+    public ?string $species = null;
+}
diff --git a/tests/JsonSchema/Command/JsonSchemaGenerateCommandTest.php b/tests/JsonSchema/Command/JsonSchemaGenerateCommandTest.php
index a55ad77d6f5..3ef06851574 100644
--- a/tests/JsonSchema/Command/JsonSchemaGenerateCommandTest.php
+++ b/tests/JsonSchema/Command/JsonSchemaGenerateCommandTest.php
@@ -228,10 +228,45 @@ public function testJsonApiIncludesSchema(): void
         $this->tester->run(['command' => 'api:json-schema:generate', 'resource' => 'ApiPlatform\Tests\Fixtures\TestBundle\Entity\Question', '--type' => 'output', '--format' => 'jsonapi']);
         $result = $this->tester->getDisplay();
         $json = json_decode($result, associative: true);
+        $properties = $json['definitions']['Question.jsonapi']['properties']['data']['properties'];
+        $included = $json['definitions']['Question.jsonapi']['properties']['included'];
 
-        $this->assertArrayHasKey('answer', $json['definitions']['Question.jsonapi']['properties']['data']['properties']['relationships']['properties']);
-        $this->assertArrayHasKey('anyOf', $json['definitions']['Question.jsonapi']['properties']['included']['items']);
-        $this->assertArrayHasKey('$ref', $json['definitions']['Question.jsonapi']['properties']['included']['items']['anyOf'][0]);
-        $this->assertSame('#/definitions/Answer.jsonapi', $json['definitions']['Question.jsonapi']['properties']['included']['items']['anyOf'][0]['$ref']);
+        $this->assertArrayHasKey('answer', $properties['relationships']['properties']);
+        $this->assertArrayHasKey('anyOf', $included['items']);
+        $this->assertCount(1, $included['items']['anyOf']);
+        $this->assertArrayHasKey('$ref', $included['items']['anyOf'][0]);
+        $this->assertSame('#/definitions/Answer.jsonapi', $included['items']['anyOf'][0]['$ref']);
+
+        $this->tester->run(['command' => 'api:json-schema:generate', 'resource' => 'ApiPlatform\Tests\Fixtures\TestBundle\ApiResource\AnimalObservation', '--type' => 'output', '--format' => 'jsonapi']);
+        $result = $this->tester->getDisplay();
+        $json = json_decode($result, associative: true);
+        $properties = $json['definitions']['AnimalObservation.jsonapi']['properties']['data']['properties'];
+        $included = $json['definitions']['AnimalObservation.jsonapi']['properties']['included'];
+
+        $this->assertArrayHasKey('individuals', $properties['relationships']['properties']);
+        $this->assertArrayNotHasKey('individuals', $properties['attributes']['properties']);
+        $this->assertArrayHasKey('anyOf', $included['items']);
+        $this->assertCount(1, $included['items']['anyOf']);
+        $this->assertSame('#/definitions/Animal.jsonapi', $included['items']['anyOf'][0]['$ref']);
+
+        $this->tester->run(['command' => 'api:json-schema:generate', 'resource' => 'ApiPlatform\Tests\Fixtures\TestBundle\ApiResource\Animal', '--type' => 'output', '--format' => 'jsonapi']);
+        $result = $this->tester->getDisplay();
+        $json = json_decode($result, associative: true);
+        $properties = $json['definitions']['Animal.jsonapi']['properties']['data']['properties'];
+        $included = $json['definitions']['Animal.jsonapi']['properties']['included'];
+
+        $this->assertArrayHasKey('species', $properties['relationships']['properties']);
+        $this->assertArrayNotHasKey('species', $properties['attributes']['properties']);
+        $this->assertArrayHasKey('anyOf', $included['items']);
+        $this->assertCount(1, $included['items']['anyOf']);
+        $this->assertSame('#/definitions/Species.jsonapi', $included['items']['anyOf'][0]['$ref']);
+
+        $this->tester->run(['command' => 'api:json-schema:generate', 'resource' => 'ApiPlatform\Tests\Fixtures\TestBundle\ApiResource\Species', '--type' => 'output', '--format' => 'jsonapi']);
+        $result = $this->tester->getDisplay();
+        $json = json_decode($result, associative: true);
+        $properties = $json['definitions']['Species.jsonapi']['properties']['data']['properties'];
+
+        $this->assertArrayHasKey('kingdom', $properties['attributes']['properties']);
+        $this->assertArrayHasKey('phylum', $properties['attributes']['properties']);
     }
 }