An initial set of PDFs were uploaded to the media section of the backoffice and a media picker was used to make associations with specific PDFs to content documents. The PDFs are regularly updated and the users would like to perform a bulk upload in the folder that has the PDFs. Is there a way to allow for the media bulk upload to replace matching documents while treating unmatched documents as new media uploads? I'm exploring some custom code options, but I'm curious to know if there might be an alternative approaches that I haven't considered.