How to scale out bitnami/mysql via helm

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1

Hello

I am using the latest minikube on a linux VPS.
I deployed a statefulset for bitnami/mysql as follows.

$ k get sts
NAME READY AGE
mysql-1677811395 1/1 28h

But I can’t scale out it via either “k scale” or helm.

This is helm commands,

helm upgrade mysql-1677811395 bitnami/mysql
–set auth.rootPassword=***
–set secondary.replicaCount=2

after implementation there is no pod number increased.

So how to scale bitnami/mysql statefulset?

kubectl: v1.26.1
helm: v3.11.1

Thanks.