Oracle : Ошибка ORA-16023

"system %s destination cannot be the same as session %s destination"
*Cause: An attempt to change the first specified LOG_ARCHIVE_DEST_n
(n = 1...31) parameter produced a destination that duplicates
the session destination value of the second specified
LOG_ARCHIVE_DEST_n parameter. This error can occur when setting a
non-NULL value with the ALTER SYSTEM command. Or, this error can
occur when setting a NULL value with ALTER SESSION command, because
then the associated system destination value may appear as a
*Action: Specify a different destination value for the first specified
LOG_ARCHIVE_DEST_n parameter.

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