Talk about a panic attack. This week, some shellshocked photographers posted on Twitter, Reddit and in Photoshop forums expressing their horror over the fact that when they downloaded Adobe’s latest update for the Lightroom app for iPhone and iPad, their existing photos and presets completely disappeared.

Adobe has since confirmed that the update had in fact deleted users’ images and presets—ones that were not already synced to the cloud—and worse, they were permanently deleted.

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As reported by The Verge, complaints and disaster stories posted on Reddit by users included one who lost over two years-worth of photo edits, and another who lost not only 800 pictures but hundreds of dollars worth of paid presets.

An early statement made by Adobe on its site said: “Some customers who updated to Lightroom 5.4.0 on iPhone and iPad may be missing photos and/or presets. This affected customers using Lightroom mobile without a subscription to the Adobe cloud. It also affected Lightroom cloud customers with photos and presets that had not yet synced to the Adobe cloud.”

[Read: 14 Storage Drives to Keep Your Deep Archives Safe]

The company added, “No assets in the Lightroom cloud were lost or are at risk. Lightroom mobile on Android, Lightroom desktop on macOS and Windows, as well as Lightroom Classic are not affected.” Adobe says version 5.4.1 has already been released, fixing the issue and preventing the issue from affecting additional users but, sadly, nothing can be done about the lost data.

The irony of the unfortunate event is not lost here. As PetaPixel reported, “We’ve reached out to Adobe for further comment and clarification, and to see if they’re willing to say how wide-spread this data loss was. But even if the glitch affected only a small number of users, it’s obviously a very bad look when your photo-editing app accidentally wipes people’s photos…and edits. This is also a great reminder for photographers that you should always back up your images, in multiple places, so you’re never subject to a single point of failure.” 

Adobe acknowledged how “frustrating and upsetting this is to people affected and we sincerely apologize.”