Fabric CA with postgres DB: register new user fails with Authorization failure

We have TLS CA and Organization CA(Root CA).

Configuration of TLS CA with postgres DB instance went fine. We are able to bootstrap admin and register our identities.
When configuring Organization CA, we are connecting to the same Postgres DB instance which is used by TLS CA.
We are able to bootstrap admin.
When registering a new user, it fails with "Authorization failure".
If we configure Org CA with a different postgres DB instance then register/enroll of new user goes fine.

Is there any restriction on having dedicated postgres DB for TLS CA and Org CA servers ?