---
title: "TYPO3 Exception 1249479819"
manual: "TYPO3 Exceptions"
version: "main"
permalink: "https://docs.typo3.org/permalink/t3exceptions:typo3-exception-1249479819"
source: "Exceptions/1249479819.rst"
modified: "2026-09-16T07:39:08+00:00"
---

# TYPO3 Exception 1249479819

> [!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).

## Persistence

You need to make sure that your object is already persisted before
calling `Repository->update($o);` Add it first with `Repository->add($o);`

## Usage of (new) property mapper / t3extblog

I encountered this exception when trying to install/use t3extblog with
TYPO3 6.2.10. Check your code for correct usage of (new) property
mapper, this should give you a hint (taken from
[https://forge.typo3.org/issues/51330](https://forge.typo3.org/issues/51330)):

old property mapper is not supported anymore and removed from the Core
after 6.2. Use the new one instead.

For those who do not know how to fix it, I will show how I have fixed
it.

Old code:

```
$persistenceManager =
\\TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('Tx_Extbase_Persistence_Manager');

```

New code:

```
$objectManager =
\\TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Extbase\Object\ObjectManager::class);
$persistenceManager =
$objectManager->get(\TYPO3\CMS\Extbase\Persistence\Generic\PersistenceManager::class);

```

## Object retrieved by property mapper can't get updated via persistence manager

If you try to `->update()` an object which has been retrieved from the
property mapper by mapping GET/POST parameters, so if you pass the
object as argument of your controller action, this issue may occur.

For me the solution was to re-retrieve the object using the repository
and `->findByUid()` method and then persist/update the retrieved object.
It seems the repository needs to "know" about the object.

```
function yourAction(\Some\Model $item)
{
    $updateItem = $this->itemRepository->findByUid($item->getUid());
    /**
     *  something with $updateItem ...
     */
    $this->itemRepository->update($updateItem);
}
```