Oracle Error Message
ORA-16806: supplemental logging is not turned on
Reason for the Error
Supplemental logging was not turned on while there was a logical standby database in the configuration. This could happen either on the primary database or on the logical standby database that was being switched over to be the primary database.
Solution
Check the Data Guard broker log for more details. Issue the ALTER DATABASE ADD SUPPLEMENTAL LOG DATA (PRIMARY KEY, UNIQUE INDEX) COLUMNS to add supplemental logging.