---
title: "Breaking: #91906 - Store TransOrigDiffSourceField as json string"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:breaking-91906"
source: "Changelog/11.0/Breaking-91906-StoreTransOrigDiffSourceFieldAsJson.rst"
modified: "2026-09-15T10:46:36+00:00"
---

# Breaking: #91906 - Store TransOrigDiffSourceField as json string

See [forge#91906](https://forge.typo3.org/issues/91906)

## Description

The TCA field `['tableName']['ctrl']['transOrigDiffSourceField']` \- often set to
`l18n_diffsource` \- stores the state of the source language record a translated
record has been created from. This is used if content in the source language
of a record has been changed to hint editors for a potentially needed update
of the translated record.

The storage format of this field has been changed from a PHP serialized string
to a json encoded string.

## Impact

Usages of this field can be expected to be core internal. The impact on existing
instances in low since it's unlikely that an extension uses the field content.

## Affected Installations

Installations with multi language sites are affected and should run the
upgrade wizard.

## Migration

Run "Admin Tools" -> "Upgrade" -> "Upgrade Wizard" -> "Migrate transOrigDiffSourceField field to json encoded string."
to adapt existing rows to the new storage format.