Oracle Solution for Error ora-16401

ORA-16401: archivelog rejected by RFS

What triggered the Error:

An attempt was made to re-archive an existing archivelog. This usually happens because either a multiple primary database or standby database(s) or both are trying to archive to this standby database.

What should we do to fix it:

See alert log and trace file for more details. No action is necessary; this is an informational statement provided to record the event for diagnostic purposes.