Zusammenfassung
The request is well-formed but has semantic errors (e.g. validation failed).
Wann er auftritt
Widely returned by REST/JSON APIs when field validation fails.
Häufige Ursachen
- Field validation failed (format, range, required)
- Business-rule violation in the payload
Lösung
- Fix the invalid fields per the error details
- Validate input against the API schema
Grundlage in der Spezifikation