---
title: "Breaking: #61822 - deprecated function getUniqueFields() removed"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:breaking-61822"
source: "Changelog/7.0/Breaking-61822-GetUniqueFieldsFunctionRemoved.rst"
typo3-version: "7.0"
typo3-major: 7
type: "breaking"
issue: 61822
forge: "https://forge.typo3.org/issues/61822"
tags: ["PHP-API", "Backend", "ext:workspaces"]
rendered: "2026-09-20T18:31:11+00:00"
---

# Breaking: #61822 - deprecated function getUniqueFields() removed {#breaking-61822}

See [forge#61822](https://forge.typo3.org/issues/61822)

## Description {#description}

The function `getUniqueFields()` from `TYPO3CMSCoreDataHandlingDataHandler` has been removed.
The function is available in `TYPO3CMSVersionHookDataHandlerHook`.

## Impact {#impact}

Extensions that still use the function `getUniqueFields()` won't work.

## Affected installations {#affected-installations}

A TYPO3 instance is affected if a 3rd party extension uses the removed function.

## Migration {#migration}

Replace all calls to `TYPO3CMSCoreDataHandlingDataHandler::getUniqueFields()`
with calls to `TYPO3CMSVersionHookDataHandlerHook::getUniqueFields()`