Important: #88045 - Locales dependencies configuration

See forge#88045

Description

Due to a bug in \TYPO3\CMS\Extbase\Utility\LocalizationUtility the configured dependencies for a (custom) locale were not taken into account.

One could circumvent this bug by declaring the following configuration as a workaround:

$GLOBALS['TYPO3_CONF_VARS']['SYS']['localization']['locales']['dependencies'] = [
   'de_AT' => [
      ['de']
   ]
];
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Since this bug now has been fixed, installations using these kinds of workaround need to update their configuration as described in the official documentation.