Manually edit this multitude of identical calendar events?

Aarghh…
I hardly ever check the calendar, since I made it more out of experimental curiosity, but now see this:

getting the events in the actions page results in:

Snippet of huge list
calendar.afvalwijzer:
  events:
    - start: "2024-08-28"
      end: "2024-08-29"
      summary: Ophaaldag Saver
      description: Restafval
    - start: "2024-08-28"
      end: "2024-08-29"
      summary: Ophaaldag Saver
      description: Restafval
    - start: "2024-08-28"
      end: "2024-08-29"
      summary: Ophaaldag Saver
      description: Restafval
    - start: "2024-08-28"
      end: "2024-08-29"
      summary: Ophaaldag Saver
      description: Restafval
    - start: "2024-08-28"
      end: "2024-08-29"
      summary: Ophaaldag Saver
      description: Restafval
    - start: "2024-08-28"
      end: "2024-08-29"
      summary: Ophaaldag Saver
      description: Restafval
    - start: "2024-08-28"
      end: "2024-08-29"
      summary: Ophaaldag Saver
      description: Restafval
    - start: "2024-08-28"
      end: "2024-08-29"
      summary: Ophaaldag Saver
      description: Restafval
etcetc

Somehow there has been some active creation goin on ( I do have that automated, but don’t see how it would have happened), and ofc I need to delete those excessive amounts of identical events.

Any thoughts how to proceed?

this is the automation that made them, and ive set some extra conditions, and mode: single

automation:

  - id: afvalwijzer_in_calendar
    mode: single
    trigger:
      platform: state
      entity_id:
        - sensor.afvalwijzer_gft
        - sensor.afvalwijzer_papier
        - sensor.afvalwijzer_plastic
        - sensor.afvalwijzer_restafval
#       not_to: &un
#         - unavailable
#         - unknown
#       not_from: *un
    condition:
      - !include /config/includes/include_from_to_not_un.yaml
      - !include /config/includes/include_to_not_is_from.yaml
    action:
      - variables:
          date: >
            {{trigger.to_state.state}}
      - service: calendar.create_event
        target:
          entity_id: calendar.afvalwijzer
        data:
          summary: Ophaaldag Saver
          description: >
            {{trigger.to_state.attributes.friendly_name}}
          start_date: >
            {{date}}
          end_date: >
            {{(as_datetime(date)+ timedelta(days=1))
               |as_timestamp|timestamp_custom('%Y-%m-%d')}}
# {{(as_datetime(date)+ timedelta(days=1)).strftime('%Y-%m-%d')}}
      - !include /config/includes/include_notify_developing_on.yaml
      - service: notify.mobile_app_marijn
        data:
          title: Nieuwe data Afvalwijzer
          message: >
            Nieuwe data in kalender gezet voor
             {{trigger.to_state.attributes.friendly_name}}
            Op {{trigger.to_state.state}}