Consistent Unexpected difference in fileset version

So I’ve waited until this recurred, which happened again last night (version 7, again found 64 entries, but expected 65).

I deleted version 7 using command line and tried to run the backup again, but now I get the same error but for a different version:

“Unexpected difference in fileset version 3: 6/12/2019 5:00:00 AM (database id: 30), found 64 entries, but expected 65”

Delete command reported removing backups from various dates, which I don’t like the sound of at all! I’d rather this just ran every night without hitting this issue, so could use a fix rather than a workaround.

Anyone?