Have you installed Camera Raw 8.7? If you have Camera Raw 8.7 and Lightroom 5.7 then you shouldn't get that message asking you to create a copy. But in either case, once the editing in Photoshop is completed a TIF or PSD file must be created. Whichever file type is saved depends on your preference settings. Photoshop is not capable of editing or saving raw image data. By the time the image has been opened in Photoshop is no longer raw image data and must be saved in a different file format.
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