428

Data

{
  "classId": "4xx",
  "code": 428,
  "description": "The origin server requires the request to be conditional to prevent lost update conflicts on concurrent modifications.",
  "isDeprecated": false,
  "reasonPhrase": "Precondition Required",
  "rfcReference": "RFC 6585"
}

History in this collection

1. addedv1.0.0Jun 12, 2026this version