How to get the sum in time of values in Lens

Filebeat's nginx module feature looks very attractive.

However, the index name seems to default to a form like filebeat-7.12.0-2022.07.29-000001.

On nginx, I have access.log and error.log, but I can't distinguish between them, so I want to change the index name.
How can I do this?

I found the following article but cannot set the index name properly

I have added the following statement

# vi /etc/filebeat/modules.d/nginx.yml
- module: nginx
   access:
     enabled: true
     var.paths: ["/var/log/nginx/access.log"]
# vi /etc/filebeat/filebeat.yml
... snip ...
output.elasticsearch:
  # Array of hosts to connect to.
  hosts: ["localhost:9200"]
  indices:
    - index: "else-httpd-access-%{+yyyy.MM.dd}"
      when.equals:
        event.module: "nginx"
    - default: "filebeat-%{[agent.version]}-%{+yyyy.MM.dd}"
... snip ...

However, I get the following error.

# tail /var/log/filebeat/filebeat
... snip ...
2022-07-29T19:27:17.106+0900    ERROR   instance/beat.go:971    Exiting: error initializing publisher: missing output.elasticsearch.indices.1.index
... snip ...

I would like to have index names such as {my service name}-httpd-access-{date}, {my service name}-httpd-error-{date} for each access.log and error.log, and for each outgoing server.

For example, kin-httpd-access-2022.07.29, kin-httpd-error-2022.07.29, els-httpd-access-2022.07.29, els-httpd-error-2022.07.29, etc ...