Courses installed on my Edge 1040 Solar System version 26.18 keep replicating. Between two and seven copies of the same courses show up. I checked the Connect site, and these courses show up only once under my training and planning tab. I don't know if it makes a difference, but I had Komoot installed. I have just uninstalled it to see if that makes a difference.
I recall someone else posting with a similar problem, but a quick search for duplicate courses came up empty this morning.