TYPO3 Exception 1314778269

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Cannot add a file that is already part of this storage.

FAL: addFile()

Error when adding a sys_file to a FAL storage via $this->storage->addFile($localFilePath, $targetFolder, $targetFileName):

The exception is thrown when the $localFilePath (the source file) is already located anywhere inside of the target's FAL local storage path. For example, inside of fileadmin/ when using the default local storage.