Time Machine couldn't complete the backup to "External Drive" Two of the disks to back up have the same name
This has started since I updated to Catalina (a couple of weeks ago: April 2020)
My Time Machine tells me to rename one of the disks named "Macintosh HD"
I only have one disk named Macintosh HD (although, I can see that the internal HD has now got two partitions - one called "Macintosh HD" and the other called "Macintosh HD - Data") I believe this is normal behaviour since Catalina, but can't see a way round the Time Machine problem.
MacBook Pro 15", macOS 10.15