MultipartFile.transferTo throws FileAlreadyExistsException

tmpFile = Files.createTempFile("foo.", ".upload").toFile()
file.transferTo(tmpFile)

        public void write(Path target) throws IOException {
            if (file != null) {
                try {
                    Files.move(file, target);
                } catch (IOException e) {
                    Files.copy(getInputStream(), target);
                }
            } else {
                Files.copy(getInputStream(), target);
            }
        }