1027: Unknown field.
The request carries a field this operation does not declare.
HTTP status: 422. May also be reported as a field-level finding in error.details[].
A field at param is not part of this operation or part. Undeclared fields are refused rather than ignored, so a misspelling can never silently fail to take effect.
Troubleshooting
Section titled “Troubleshooting”- Inspect details[].param and remove or correct the field; compare against GET /v1/openapi.yaml or GET /v1/parts/{type}.