Answer / guest

Cause: The unprivileged account has DBA privileges. The
unprivileged account specified by DEFAULT_USER_ACCOUNT in
the SID_DESC in LISTENER.ORA is a member of the dba group
specified by DBA_GROUP in SID_DESC. The unprivileged account
cannot belong to the dba group because this would be a
security violation with OPS$ logins.

Action: Remove the unprivileged account from the dba group.

Please add more information about this Error

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