Oracle® Database 11g / 12c / 18c error codes ORA-12442: policy column "[string]" already used by an existing policy

ORA-12442: policy column "[string]" already used by an existing policy

Oracle Error Code: ORA-12442

Cause: You tried to create a policy with the same policy column name as an existing policy.

Action: Use a different name for the policy column or drop the existing policy.