Request with response 404 (document_missing_exception) creates an index

[xeraa]

Elasticsearch Version

9.0.0

Installed Plugins

No response

Java Version

bundled

OS Version

Elastic Cloud (Hosted)

Problem Description

A failing request — 404, document_missing_exception creates an index if doesn't yet exist

Steps to Reproduce

Console script to create the indexshouldnotbecreated index:

DELETE indexshouldnotbecreated

POST indexshouldnotbecreated/_update/1
{
  "script": {
    "source": "ctx._source.counter += params.count",
    "lang": "painless",
    "params": {
      "count": 4
    }
  }
}

GET _cat/indices/indexshouldnotbecreated

Logs (if relevant)

No response

[elasticsearchmachine]

Pinging @elastic/es-data-management (Team:Data Management)