Cloudera Altus - create CM with existing postgre DB

Hi Cloudera,

 the cloudera altus director cannot create a database(s) for CM and throws this error, even if it has a root user access to the external AWS RDS posgre database:

org.postgresql.util.PSQLException: ERROR: must be member of role "cmadmin_dkndwlxo"

I could not find any hint in the docs what this exact role means and why the root user must be member of this role.

Postgre error log:

2019-11-25 11:07:06 UTC:10.150.1.7(43878):dbroot@postgres:[12215]:ERROR: must be member of role "cmadmin_dkndwlxo"
2019-11-25 11:07:06 UTC:10.150.1.7(43878):dbroot@postgres:[12215]:STATEMENT: create database scm_75ilop0jdikuhinujsfs7l5m1n owner cmadmin_dkndwlxo encoding 'UTF8'
2019-11-25 11:07:17 UTC:10.150.1.7(43880):dbroot@postgres:[12313]:ERROR: must be member of role "cmadmin_wrhjespw"
2019-11-25 11:07:17 UTC:10.150.1.7(43880):dbroot@postgres:[12313]:STATEMENT: create database scm_38kegs9qab7j5l6hgqo069h3am owner cmadmin_wrhjespw encoding 'UTF8'
2019-11-25 11:07:28 UTC:10.150.1.7(43882):dbroot@postgres:[12422]:ERROR: must be member of role "cmadmin_kfelwpnh"
2019-11-25 11:07:28 UTC:10.150.1.7(43882):dbroot@postgres:[12422]:STATEMENT: create database scm_5vrk2jc93r9h4nq9n87c3majfp owner cmadmin_kfelwpnh encoding 'UTF8'
2019-11-25 11:07:48 UTC:10.150.1.7(43884):dbroot@postgres:[12703]:ERROR: must be member of role "cmadmin_xxyehrrb"
2019-11-25 11:07:48 UTC:10.150.1.7(43884):dbroot@postgres:[12703]:STATEMENT: create database scm_fprfmbk5dq8n7n659594goeukg owner cmadmin_xxyehrrb encoding 'UTF8'
2019-11-25 11:08:19 UTC:10.150.1.7(43886):dbroot@postgres:[13017]:ERROR: must be member of role "cmadmin_qgathjfw"
2019-11-25 11:08:19 UTC:10.150.1.7(43886):dbroot@postgres:[13017]:STATEMENT: create database scm_fo6j4rn05hdlrid3g0l584urjs owner cmadmin_qgathjfw encoding 'UTF8'

Postgre users:

test=> \du
                                    List of roles
    Role name     |                   Attributes                   |    Member of
------------------+------------------------------------------------+-----------------
 cmadmin_dkndwlxo |                                                | {}
 cmadmin_kfelwpnh |                                                | {}
 cmadmin_qgathjfw |                                                | {}
 cmadmin_wrhjespw |                                                | {}
 cmadmin_xxyehrrb |                                                | {}
 dbroot           | Create role, Create DB                        +| {rds_superuser}
                  | Password valid until infinity                  |

Any hints?

Thanks