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I’ve done something stupid. I’ve created a static QR code which is in print, and was linked to the url of a media file. I didn’t realise the URL of the media file was date dependant so when I re uploaded the media file the URL has changed and my QR code no longer works. I’ve tried changing the slug name but this doesn’t work. It gives me: uploads/2003-08-myfile instead of uploads/2003/08/myfile