Usage of more than one ICS Calender file

[Th-Be]

Hello there.
Im new into this and i got one issue with the integration.
Is there a possibility to use more than one ICS calender file?

This is actually my config:

waste_collection_schedule:
sources:
- name: ics
args:
file: "www/calender1.ics"
- name: ics
args:
file: "www/calender2.ics"
- name: ics
args:
file: "www/calender3.ics"

  customize:
    "Calender 1"
    - type: "Graue Tonne"
      alias: grau
      icon: mdi:trash-can
    - type: Blaue Tonne
      alias: blau
      icon: mdi:trash-can-outline
    - type: Gelbe Tonne
      alias: gelb
      icon: mdi:recycle
    - type: Braune Tonne
      alias: braun
      icon: mdi:flower-outline

    "Calender 2"
    - type: "Leerung: Restabfall"
      alias: grau-2
      icon: mdi:trash-can

    - type: "Leerung: PPK"
      alias: blau-2
      icon: mdi:trash-can-outline
    "Calender 3"
    - type: "Leichtverpackungen"
      alias: gelb-2
      icon: mdi:recycle

If i use it like this, only the sensors of calender 1 are working if is use "#" on file: "www/calender1.ics" the sensors of calender 2 are working.
How can I use all calenders and sensors?
Thanks for your help.