---
title: "TYPO3 Exception 1660215701"
manual: "TYPO3 Exceptions"
version: "main"
permalink: "https://docs.typo3.org/permalink/t3exceptions:typo3-exception-1660215701"
source: "Exceptions/1660215701.rst"
rendered: "2026-10-01T16:20:50+00:00"
---

# TYPO3 Exception 1660215701 {#typo3-exception-1660215701}

> [!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 13.4.18 - 26.09.2025 {#typo3-13-4-18-26-09-2025}

> [!WARNING]
> The type of property MyVendorMyExtensionDomainModelMyModel::pageoverride could not be identified because the property
> is defined as union or intersection type, therefore the desired value (0) cannot be mapped onto it.
> Make sure to use only a single type.

### The Issue {#the-issue}

The model had a setter, which accidently used bool instead of null for a not-set value

```php
#[Lazy]
protected ?Page $pageoverride = null;

public function setPageoverride(Page|bool $pageoverride): void
{
    $this->pageoverride = $pageoverride;
}
```

### Solution {#solution}

```diff
- public function setPageoverride(Page|bool $pageoverride): void
+ public function setPageoverride(Page|bool $pageoverride): void
```