Lost most of my edits after catalogue upgrade

Hi,

I recently upgraded to v13 and updated my catalogue accordingly. I just realized A LOT of my edits over the years are just missing, I see my photos correctly but edits in some folders are completely missing. For example, in my folder `2019-12` and `2019-08` everything is fine but in `2019-10` all my edits are missing.

I have a lot of backups on my computer, some of them have the edits for `2019-10`, even after the catalogue upgrade to v13, but I'm missing a lot of recent changes if I use this backup.

Is there a way to understand what's happening here ? And is it possible to get the edits from a specific folder in a specific catalogue and import them back in my current (and most up to date) catalogue ?

Thanks,