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Almost lost my edits, pls help so I won't be stupid again ...

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New Member
Sep 14, 2022
Lightroom Version
Operating System
  1. macOS 12 Monterey
I have my Lightroom Catalog (+ several catalog backups) on my internal SSD on my Mac and my raw files + .xmp sidecar files on the external hard drive (backed up as well on another hdd).
I always had Lightroom to write changes to XMP files (save .xmp feature selected in catalog settings).
Yesterday I had a shock when I noticed that for some strange reason some edits in particular folders or files were gone. I inspected the .xmp file for those files and they all were totally "striped" down of the edits, back to "default" (no edits). Those "modified" xmp files were like 4 KB when others that contained edits were around 10 kb.

The behavior was strange because It affected only some folders and some files thru the entire catalog. Some edits were there, others not. Some files from within the same period had edits, others not.
I had a sleepless night trying to restore a bunch of catalogs .... same results. The backup catalogs were loading with the edited preview but almost instant would reset back to "no edit" state (kinda like reading the "modified" .xmp with no edits)
Today I reverted back to my current (to date) catalog. When browsing around, I noticed in Develop Module that the latest entry was "Reset Settings". When I rolled-back the history on entry before it .... VOILA !!! THE EDITS ARE BACK !!!!
I want to ask you guys, what caused this behavior ? What created that "Reset Settings" entry in develop module history, only for some particular files ?
How can I prevent this to happen in the future ?
Thank you so much ! Today I am filled with relief and happiness because I managed to save my edits :D and I want to prevent this for ever happen again. !
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