Skills grow simultaneously
I have a problem with the German course. There are two different skills: Pos.pron. and Nom. pron. I started doing the first one, but every level I got there was added to the second skill as well. So when I finished with Pos. Pron. and started Nom. Pron., I found out that I don't know many basic things that are required for that skill. I think it is a bug. By the way, is there any possibility to reset the progress for a particular skill?
Do you now, by any chance, is it possible to reset the progress for a particular skill?
No, that is not possible.
It is a bug in many courses from the start of the 'crown method' (spring 2018).
And, as usual from spring 2017, Duolingo's staff don't solve this bug either.
https://forum.duolingo.com/comment/29974297 shows an overview of other false linked skills in the course "German for English speakers".
You can report this as a bug here: https://support.duolingo.com/hc/en-us/requests/new