In certain cases, after the customer uploads files to your bucket on Amazon Web Services S3, you may make changes to the files prior to submitting these for printing. In the case where you have prepared new artwork files, then the links pointing to the original files uploaded by the customer are pointing to old and useless files. These old files can be dangerous if anyone downloads these files and uses them.
wp2print contains a mechanism that allows you to mark artwork files as "old" or "invalid" and then upload replacement files. In this way, anyone that uses the link to download the artwork files will download "good" or "recent" files.
The video below illustrates the process of replacing old artwork files with new artwork files: