Override configuration

1

We have sit env and we want to launch keycloak on uat env with sit database, so we export and import keycloak database from sit to uat . when we launch helm-chart with new config e.g: new broker , new Redis , new user admin and password , not override on uat env and all configuration is sit env ! how can we launch with new configuration?
I use https://artifacthub.io/packages/helm/codecentric/keycloak/ helm-chart

our config in values.yaml:

- name: KEYCLOAK_USER
    value: "admin"
  - name: KEYCLOAK_PASSWORD
    valueFrom:
      secretKeyRef:
        name: keycloak
        key: password    
  - name: KAFKA_HOST
    value: kafka.infra
  - name: KAFKA_PORT
    value: "9092"

thanks a lot.