[Solved] Why am I getting permission denied on an ownership change?

Kit Sunde Asks: Why am I getting permission denied on an ownership change?
My current user is pronto

Code:
mediapop_staging=> select current_user;
 current_user
--------------
 pronto
(1 row)

This user a standard super user created on AWS RDS.

Code:
mediapop_staging=> du pronto
                        List of roles
 Role name |          Attributes           |    Member of
-----------+-------------------------------+-----------------
 pronto    | Create role, Create DB       +| {rds_superuser}
           | Password valid until infinity |

But I’m getting this:

Code:
mediapop_staging=> REASSIGN OWNED BY pronto TO mediapop_staging;
ERROR:  permission denied to reassign objects

Why? How can I resolve it?

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