Enum describing possible policy validation parameter errors.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v25/errors/policy_validation_parameter_error.proto)

| Enums ||
|---|---|
| ## `CANNOT_SET_BOTH_IGNORABLE_POLICY_TOPICS_AND_EXEMPT_POLICY_VIOLATION_KEYS` | Cannot set ignorable policy topics and exempt policy violation keys in the same policy violation parameter. |
| ## `UNKNOWN` | The received error code is not known in this version. |
| ## `UNSPECIFIED` | Enum unspecified. |
| ## `UNSUPPORTED_AD_TYPE_FOR_EXEMPT_POLICY_VIOLATION_KEYS` | Exempt policy violation keys are not supported for the ad type. |
| ## `UNSUPPORTED_AD_TYPE_FOR_IGNORABLE_POLICY_TOPICS` | Ignorable policy topics are not supported for the ad type. |