A few questions about Docker Compose configuration

[towerbit]

In the docker-compose.yaml file,

1. Will directly setting MEANS_SECRET_KEY not take effect on Means__Storage__DefaultSecretKey?
2. After the docker compose up, modifying Means__Storage__DefaultSecretKey and then reload( down->up) the container has no effect?
3. Is it necessary to delete the persistent data directory and rebuild the container’s DefaultSecretKey for the changes to take effect?
4. Can’t the AccessKey “meanadmin” be deleted or disabled?

      MEANS_SECRET_KEY: "meansadmin-my-secret-key"
      Means__Storage__DefaultAccessKey: "${MEANS_ACCESS_KEY:-meansadmin}"
      Means__Storage__DefaultSecretKey: "${MEANS_SECRET_KEY:-meansadmin-local-secret}"