Deprecation: #63603 - ExtendedFileUtility::$dontCheckForUnique is deprecated

See Issue #63603

Description

The ExtendedFileUtility $dontCheckForUnique flag has been marked as deprecated and replaced by $fileUtility->setExistingFileConflictMode() with the possible options of the \TYPO3\CMS\Core\Resource\DuplicationBehavior enumeration.

Impact

Extensions still using ExtendedFileUtility::$dontCheckForUnique will throw a deprecation warning.

Affected Installations

All installations with extensions that use ExtendedFileUtility::$dontCheckForUnique.

Migration

Change the $fileUtility->dontCheckForUnique = TRUE to $fileUtility->setExistingFileConflictMode(DuplicationBehavior::REPLACE).