I practiced this morning, but I have had not enough time for the entire first series. The reason: I got slowly. Now I think I have 2 choices:
First: I get faster again.
Second: I omit asanas, every day other asana.
I will test what feels better.
I think one of the reasons why I need more time is, that it doesn't hurt anymore when I'm in the asanas. I like to do them. It is nice. I can concentrate on the breath and not on the pain.
Thank you Q for your hint regarding the yoga studio in Barcelone, Spain. I will definitely go to this studio and write how it was.