The following is the ORA-16617 error message, you can learn the cause and solution of the Oracle database error.
ORA-16617 Unknown object identifier specified in request
Cause: The Data Guard broker returns this error when the object identifier specified in the request is invalid or unknown. For example, this error is returned if an invalid or unknown site object identifier is specified in a request that requires a site object identifier.
Solution: Verify that a valid object identifier was specified in the request and then re-issue the request.
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