TYPO3 Core

In FileDeletionAspect::cleanupCategoryReferences() there is the Null Coalescing operator used for not accessing the possibly not existing key '_ORIG_uid', and uses instead 'uid'. But the latter might also not have been set.

// Retrieve the file metadata uid which is different from the file uid.
$metadataProperties = $fileObject->getMetaData()->get();
$metaDataUid = $metadataProperties['_ORIG_uid'] ?? $metadataProperties['uid'];