Android : Download already finished; skipping

I am creating a downloadManager request and try to download files, everything works fine, until it started to skip downloads..

after looking at the logs I saw this

D/DownloadManager(16292): Download 4153 already finished; skipping

I guess it is somehow recognizing the download (url?) and skips it, for me this is not desireable, since I need redownload files sometimes since they are changed or just for my own testing.

how can I get around this behaviour?

code snippet:

    dm = (DownloadManager) activity.getSystemService(activity.DOWNLOAD_SERVICE);

    Request request = new Request(
            Uri.parse( (String) params.get("url") ));

    request.setVisibleInDownloadsUi(false);
    request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_HIDDEN);
    enqueue = dm.enqueue(request);


    Intent i = new Intent();
    i.setAction(DownloadManager.ACTION_VIEW_DOWNLOADS);
    activity.startActivity(i);