ORA-16503: cannot exceed the maximum number of databases in this configuration
Cause:
The Data Guard broker configuration already contained the maximum number of databases that could be configured and managed by the broker.
Action:
Select and remove an existing database from the broker configuration, then reissue the command to add another database to the configuration. Note that when COMPATIBLE is set lower than 11.2.0.0.0, the broker can configure and manage up to 10 databases. When COMPATIBLE is set to 11.2.0.0.0 or higher, this limit is increased to 31.