Using STS assume role with persistent secret fails

[kekwan]

I have the following persistent secret configured on session initialization.

CREATE OR REPLACE PERSISTENT SECRET persistent_credential_chain (
      TYPE s3,
      PROVIDER credential_chain,
      CHAIN 'sts',
      assume_role_arn 'arn:aws:iam::x:role/my-role',
      external_id 'generic-role',
      region 'us-west-2'
  );

This configuration results in the following error.

Exception thrown while trying to refresh secret persistent_credential_chain. To fix this, please recreate or remove the secret and try again. Error: 'Invalid Input Error: Cannot create temporary secrets in a persistent secret storage!'

This looks like a bug to me. When using sts, credentials are automatically refreshed and it seems that it replace existing credentials with persistent storage.