diff --git a/UPGRADE-5.0.md b/UPGRADE-5.0.md
index 4cbf26328..789626344 100644
--- a/UPGRADE-5.0.md
+++ b/UPGRADE-5.0.md
@@ -48,4 +48,6 @@ This parameter was deprecated since `4.25.2`
 
 ## BC BREAK: Removed `Nelmio\ApiDocBundle\Form\Extension::getExtendedType()`
 
-## BC BREAK: Removed `null` as a possible type for parameter `$options` in `Nelmio\ApiDocBundle\Model\Model::__construct()` & `Nelmio\ApiDocBundle\Attribute\Model::__construct()`
\ No newline at end of file
+## BC BREAK: Removed `null` as a possible type for parameter `$options` in `Nelmio\ApiDocBundle\Model\Model::__construct()` & `Nelmio\ApiDocBundle\Attribute\Model::__construct()`
+
+## BC BREAK: Removed `Nelmio\ApiDocBundle\Exception\UndocumentedArrayItemsException`
\ No newline at end of file
diff --git a/src/Exception/UndocumentedArrayItemsException.php b/src/Exception/UndocumentedArrayItemsException.php
deleted file mode 100644
index f6cee4224..000000000
--- a/src/Exception/UndocumentedArrayItemsException.php
+++ /dev/null
@@ -1,58 +0,0 @@
-<?php
-
-/*
- * This file is part of the NelmioApiDocBundle package.
- *
- * (c) Nelmio
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Nelmio\ApiDocBundle\Exception;
-
-trigger_deprecation(
-    'nelmio/api-doc-bundle',
-    '4.17.0',
-    'The "%s" class is deprecated and will be removed in a future version',
-    UndocumentedArrayItemsException::class,
-);
-
-/**
- * @deprecated since 4.17, this exception is not used anymore
- */
-class UndocumentedArrayItemsException extends \LogicException
-{
-    private ?string $class;
-    private string $path;
-
-    public function __construct(?string $class = null, string $path = '')
-    {
-        $this->class = $class;
-        $this->path = $path;
-
-        $propertyName = '';
-        if (null !== $class) {
-            $propertyName = $class.'::';
-        }
-        $propertyName .= $path;
-
-        parent::__construct(sprintf('Property "%s" is an array, but its items type isn\'t specified. You can specify that by using the type `string[]` for instance or `#[OA\Property(type="array", new OA\Items(type="string"))]`.', $propertyName));
-    }
-
-    /**
-     * @return string|null
-     */
-    public function getClass()
-    {
-        return $this->class;
-    }
-
-    /**
-     * @return string
-     */
-    public function getPath()
-    {
-        return $this->path;
-    }
-}