---
title: "TYPO3 Exception 1440499338"
manual: "TYPO3 Exceptions"
version: "main"
permalink: "https://docs.typo3.org/permalink/t3exceptions:typo3-exception-1440499338"
source: "Exceptions/1440499338.rst"
rendered: "2026-10-02T18:04:37+00:00"
---

# TYPO3 Exception 1440499338 {#typo3-exception-1440499338}

> [!NOTE]
> Below, the TYPO3 community may have provided additional information or
> solutions for this exception. However, these may or may not apply to your
> particular case. If you can provide more information, you should come back
> here and add your experience and solution steps to this issue once you have
> resolved it.
>
> General TYPO3 troubleshooting tips can be found in the *Troubleshooting*
> section in the menu. You can also ask questions and receive support in the
> [TYPO3 Questions category on talk.typo3.org](https://talk.typo3.org/c/typo3-questions/).
>
> To add your experience, click "Edit on GitHub" above and follow the
> ["Edit on GitHub" workflow](https://docs.typo3.org/m/typo3/docs-how-to-document/main/en-us/Howto/EditOnGithub.html#docs-contribute-github-method).
> Also check out
> [our tip on Coding Style and reST](https://docs.typo3.org/permalink/t3exceptions:tip-about-rest-coding-style).

## TYPO3 v12.3 - 2023-03-30 {#typo3-v12-3-2023-03-30}

### The issue {#the-issue}

With TYPO3 v12.3 the items of the TCA types "check", "radio" and "select" requires
a "label" key instead of the array index "0". In v12 a TCA migration is in place which
is not applied to custom site configurations in v12.3.

> [!NOTE]
> **See also**
>
> -   [Feature: #99739 - Associative array keys for TCA items](https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/12.3/Feature-99739-AssociativeArrayKeysForTCAItems.html)
> -   [Bug: #100359 - Using TCA type "checkbox" in custom site configuration field throws error](https://forge.typo3.org/issues/100359)

### Solution {#solution}

Migrate from:

```php
'config' => [
    'type' => 'check',
    'renderType' => 'checkboxToggle',
    'items' => [[
        0 => '',
        1 => '',
    ]],
]
```

to:

```php
'config' => [
    'type' => 'check',
    'renderType' => 'checkboxToggle',
    'items' => [[
        'label' => '',
        'value' => '',
    ]],
]
```

To stay compatible with TYPO3 v12 and v11, use:

```php
'config' => [
    'type' => 'check',
    'renderType' => 'checkboxToggle',
    'items' => [[
        0 => '',
        1 => '',
        'label' => '',
        'value' => '',
    ]],
]
```