em-Client and nextcloud


I have a problem with nextcloud (version 21.0.2) and my eM-Client under windows 10.
I have installed nextcloud on my webspace. I have created two calenders called privat, work.
I copy the privat link from the calender work.
In my eM-client I create a new account (Kalender caldav), copy the privat link and the account datas from the calender work in the configuration of the calender. And what can I see in my eM-Client: I see both calenders under work: work and privat calender.

Can somebody help me.
Thanks for the support.