Field not writable

HTTP 422 · field-not-writable — ← all Webpath errors

A field in the PATCH is server-owned, or not allowed on this target.

How to recover. Set only the writable fields named in the detail.

Example response

{
  "type": "https://muse.as/a/webpath/errors/field-not-writable",
  "title": "Field not writable",
  "status": 422,
  "detail": "Set only the writable fields named in the detail."
}

This page documents the field-not-writable error type returned in Webpath RFC 7807 application/problem+json responses. The machine-readable detail field carries a recovery hint you can show a user verbatim — see the Spec §12 and API Reference.