precondition-required - andteam

Status 428. An If-Match header is required. The response is application/problem+json, and its type is https://docs.andteam.com/api/problems/precondition-required:

{
  "type": "https://docs.andteam.com/api/problems/precondition-required",
  "title": "An If-Match header is required",
  "status": 428
}

What it means

This request changes a record and needs If-Match with the record’s ETag.

What to do

Read the record, then send its ETag as If-Match. See Retries and versions. See Errors for every type.