---
title: "Deprecation: #86323 - Configuration key \"site\" in YAML site configuration"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:deprecation-86323"
source: "Changelog/9.5/Deprecation-86323-ConfigurationKeySiteInYAMLSiteConfiguration.rst"
typo3-version: "9.5"
typo3-major: 9
type: "deprecation"
issue: 86323
forge: "https://forge.typo3.org/issues/86323"
tags: ["Backend", "NotScanned", "ext:core"]
rendered: "2026-09-20T18:31:11+00:00"
---

# Deprecation: #86323 - Configuration key "site" in YAML site configuration {#deprecation-86323}

See [forge#86323](https://forge.typo3.org/issues/86323)

## Description {#description}

The site configuration is a file called `config` in a folder called `sites` and does not need a `site` key
to identify its purpose. To keep writing the config as easy as possible, the site configuration moved one level up and
now resides directly in `config.yaml`.

## Impact {#impact}

Having the site configuration below the key "site" has been marked as deprecated and will trigger a PHP `E_USER_DEPRECATED` error.

## Affected Installations {#affected-installations}

Installations with a site config that have a key "site" are affected.

## Migration {#migration}

Remove the "site" key and first level indentation either by directly editing the YAML file or by saving via the sites module.