title: File is not renamed
body: <p>I'm trying to implement this Spring endpoint:</p>
  
  <pre><code>private static String UPLOADED_FOLDER = "/opt/";
  
  @PostMapping(value = "/upload", produces = { MediaType.APPLICATION_JSON_VALUE })
      public ResponseEntity&lt;StringResponseDTO&gt; uploadFile(@RequestParam("file") MultipartFile file, RedirectAttributes redirectAttributes, @RequestParam("id") Integer merchant_id) throws Exception {
  
          InputStream inputStream = file.getInputStream();
  
          try {
              byte[] bytes = file.getBytes();
  
              File directory = new File(UPLOADED_FOLDER, merchant_id.toString());
              directory.mkdirs();
              File newFile = new File(directory, file.getOriginalFilename());
              newFile.renameTo(new File("merchant_logo.png"));
              Files.write(newFile.toPath(), bytes);
  
              redirectAttributes.addFlashAttribute("message",
                      "You successfully uploaded '" + file.getOriginalFilename() + "'");
  
          } catch (IOException e) {
              e.printStackTrace();
          }
  
          return ResponseEntity.ok(new StringResponseDTO(originalName));
      }
  </code></pre>
  
  <p>The general idea is to rename the file and override previous file with the same name. But for some reason it's not working. I get the old file content. Any idea why?</p>