cleanupDestination? Files getting deleted after download?I have downloaded same picture.

[VikasPawar2112]

I want to download duplicate pictures and save them as picid(1),picid(2) etc.
I used to same url to download picture and i am saved the those picture as picture id.
So, they don't save into gallery.
It show D/ThinDownloadManager: cleanupDestination() deleting /storage/emulated/0/Pictures/ShareApp/Pic74402848.jpg
So, it's possible to download duplicate pictures.

Here is my code:
public void download(List pictureList) {
this.pictureList = pictureList;
Random random = new Random();
for (Picture picture : pictureList) {
RetryPolicy retryPolicy = new DefaultRetryPolicy();
Uri downloadUri = Uri.parse(picture.getPicUrl());
DownloadPictures.downloadIssue("Before Downloaded Picture Name" + picture.getPicUrl());
String fileName = "Pic" + picture.getPicId()/System.currentTimeMillis() + random.nextInt()/ + ".jpg";
Uri destinationUri = Uri.parse(shareAppFile + "/" + fileName);
DownloadRequest downloadRequest1 = new DownloadRequest(downloadUri)
.setDestinationURI(destinationUri).setPriority(DownloadRequest.Priority.LOW)
.setRetryPolicy(retryPolicy)
.setDownloadContext(picture.getPicId())
.setStatusListener(downloadStatusListenerV1);
downloadRequests.add(downloadManager.add(downloadRequest1));
}
}