[sdsl]

I have two Time Machine disks connected at all times, they run alternating Time Machine backups. I also periodically connect a clone for SuperDuper and run it.

This is for a MacBook Pro that is on Catalina. After the recent move from Mojave to Catalina, now sometimes I get an error message for a Time Machine backup that failed, but I ONLY see this when I am doing a SuperDuper backup (incremental), never at other times:

Time Machine couldn't complete the backup to xxxx Two of the disks to back up have the same name. Rename one of the disks named “Macintosh HD”.

Is this somehow related to the "clone" of the disk by SuperDuper? I have been dismounting both Time Machine drives during SuperDuper to avoid this. But it seems that something may be wrong with my configuration?