temporal frontend unable to connect to elasticsearch visibilitystore

I am trying to deploy temporal with visibility set as elastic search... but I am getting this error.
Error: INSTALLATION FAILED: execution error at (temporal/templates/server-deployment.yaml:37:28): Please specify cassandra port for visibility store.

Thus is my values.custom.yaml file:
server:
enabled: true
config:
persistence:
defaultStore: default
advancedVisibilityStore: es-visibility
datastores: {}

  default:
    driver: "sql"
    sql:
      driver: "mysql"
      host: "10.24.40.101"
      port: 4000
      database: "temporal"
      user: "readwrite"
      password: "2UQs4+iw0U"
      maxConns: 500
      maxConnLifetime: "1h"

  es-visibility:
    driver: "elasticsearch"
    elasticsearch:
      version: "v8"
      logLevel: "error"
      url:
        scheme: "http"
        host: "chanakya-temporal-playground-es-http.ekl-cl-chanakya-playground.svc.cluster.local:9200"
      indices:
        visibility: "temporal_visibility"

cassandra:
enabled: false
config:
ports:
cql: 9042

mysql:
enabled: false # We're using external MySQL

postgresql:
enabled: false

elasticsearch:
enabled: false # Using external Elasticsearch
external: true
version: "v8"
scheme: "http"
host: "chanakya-temporal-playground-es-http.ekl-cl-chanakya-playground.svc.cluster.local"
port: "9200"
username: ""
password: ""
visibilityIndex: "temporal_visibility_v1"
logLevel: "error"

prometheus:
enabled: false

grafana:
enabled: false

schema:
setup:
enabled: false # Schema already set up
update:
enabled: false # Schema already set up

I am not even using cassandra enywhere but still getting this issue.

Start with temporal/templates/server-deployment.yaml:37:28 and compare its Cassandra port validation with the persistence and external Elasticsearch settings in values.custom.yaml. Reproduce the Helm installation using the supplied configuration, then verify that an external Elasticsearch visibility store with Cassandra disabled no longer triggers the Cassandra-port error.