Archiving of data files: move files which are not in Archiv folder

If you use the archiving of data files (after the import) by moving them to an archive folder, there is an error message, when a file already exists in the Archive folder and the archiving is stopped completely.
So if you have 10 files and the first one already exists in the archive folder, an error message is logged and the archiving stops without moving the rest of the 9 files, even if they do not exists in the archiv folder.
THe idea is, to go on with the archiving for all files even if ONE already exists.