ORA-10485: Real-Time Query cannot be enabled while applying migration redo.

admin

ORA-10485: Real-Time Query cannot be enabled while applying migrationredo.
Cause: The Real-Time Queryfeature was enabled when an attempt was made to
recover through migration redo generated during primary upgrades or
downgrades.
Action: Close the standbydatabase in order to recover through migration redo.
Reenable the Real-Time Query feature afterwards.