Not exactly sure when this started, but perhaps a year ago or so, every so often when I would reopen lightroom classic after a while and the below message would pop up.
The repair catalog process would not work and then lead me to the next pop up window as per below:
The try again would never result in a fix, so I would dig up a backed up catalog from my backups and open that and things would be fine.
But eventually this would happen again and again, first it only occured once a month or so, but since then the frequency of occurance has increased, to the point where it was every time I reopened lightroom.
I did some browsing on the support pages but could never find a solution that I had not already tried or had the same issue as I did.
I do have a large catalog, with a few years of images - not good practice I know - so I thought perhaps that could be contributing to the issue. I created a brand new catalog and things seemed to be running fine on that but just topday I went to open lioghtroom and again have a corrupt catalog.
Not really sure what to try next. If I can't find a fix for it then I will have to cancel my adobe subscription, since it is no longer useable, and has really affected my motivation to shoot & edit photos.
Seems simpler to use a single catalog, but i've been told its not good... anyway I have a fairly new SSD hard drive. The laptop is a 2018 model but I updated the hard drive with a new one in 2020. I suppose they're both getting on a little bit.
I ran this in the comand prompt
Catalog is stored in default location under pictures.
Agreeing with @F. McLion — repeated catalog corruption is almost always a hard disk malfunction. Run deep diagnostics on your hard disk. Try placing the catalog file on a different disk and see if the problem goes away. Try replacing the hard disk.