ORA-12447: policy role already exists for policy string

ORA-12447
ORA-12447: policy role already exists for policy string
Cause: The role named <policy>_DBA already exists.
Action: Correct the policy name or delete the existing policy.
More details : Viste http://www.high-oracle.com/ora-12447/
More details : Viste http://www.high-oracle.com/ora-12447/
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