Repeated corrupt catalog in Lightroom Classic

Hello,

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.  

Any assitance would be much appreciated!

Dale

[moved from bugs to discussions space - mod.]