Not possible to use multiple year-pages

Hi, I tried out everything, but it is not possible to set up multiple year pages in a calender view.
I created a new calender-view using the template offert by the module.
Day, Month, Week and Year works fine.
Now, I need an additional year-calender to display only one content type (hollidays).
As soon, I add a second year-page, the day-links of the first year-page change to /calender/year/date instead of staying on /calender/day/date.
The new generated year-page (holidays) links well to the /calender/day/date
It doesn't matter if I create a NEW page and set it up from stretch or if I duplicate an existing page.
I can reproduce this - if I create a third year page, only this one links fine to the /calender/day/date
Is there a way out of this problem?

Have great Easter!