diff --git a/src/ApiPlatform/NormalizePropertyNameCollectionFactory.php b/src/ApiPlatform/NormalizePropertyNameCollectionFactory.php
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+++ b/src/ApiPlatform/NormalizePropertyNameCollectionFactory.php
@@ -0,0 +1,77 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2025 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+
+namespace App\ApiPlatform;
+
+use ApiPlatform\Metadata\Property\Factory\PropertyNameCollectionFactoryInterface;
+use ApiPlatform\Metadata\Property\PropertyNameCollection;
+use Symfony\Component\DependencyInjection\Attribute\AsDecorator;
+use function Symfony\Component\String\u;
+
+/**
+ * This decorator removes all camelCase property names from the property name collection, if a snake_case version exists.
+ * This is a fix for https://github.com/Part-DB/Part-DB-server/issues/862, as the openapi schema generator wrongly collects
+ * both camelCase and snake_case property names, which leads to duplicate properties in the schema.
+ * This seems to come from the fact that the openapi schema generator uses no serializerContext, which seems then to collect
+ * the getters too...
+ */
+#[AsDecorator('api_platform.metadata.property.name_collection_factory')]
+class NormalizePropertyNameCollectionFactory implements PropertyNameCollectionFactoryInterface
+{
+    public function __construct(private readonly PropertyNameCollectionFactoryInterface $decorated)
+    {
+    }
+
+    public function create(string $resourceClass, array $options = []): PropertyNameCollection
+    {
+        // Get the default properties from the decorated service
+        $propertyNames = $this->decorated->create($resourceClass, $options);
+
+        //Only become active in the context of the openapi schema generation
+        if (!isset($options['schema_type'])) {
+            return $propertyNames;
+        }
+
+        //If we are not in the jsonapi generator (which sets no serializer groups), return the property names as is
+        if (isset($options['serializer_groups'])) {
+            return $propertyNames;
+        }
+
+        //Remove all camelCase property names from the collection, if a snake_case version exists
+        $properties = iterator_to_array($propertyNames);
+
+        foreach ($properties as $property) {
+            if (str_contains($property, '_')) {
+                $camelized = u($property)->camel()->toString();
+
+                //If the camelized version exists, remove it from the collection
+                $index = array_search($camelized, $properties);
+                if ($index !== false) {
+                    unset($properties[$index]);
+                }
+            }
+        }
+
+        return new PropertyNameCollection($properties);
+    }
+}
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