Oracle : Ошибка ORA-16821

16821, 0000, "logical standby database dictionary not yet loaded"
*Cause: The logical standby database had not loaded the dictionary.
This status was detected by the broker health check mechanism.
Alternatively, this status may be returned when attempting to
switch or fail over to a logical standby database that had not
yet loaded its dictionary.
*Action: Start SQL Apply on the logical standby database, if it is not
already running, and wait for it to reach the APPLYING state.

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