Updating value of nested field with update_by_query API

Elastic Stack Elasticsearch
1

Hi experts,

I am looking to run _update_by_query where i intend to update a field in nested object (commenter_types.ctype) with the value of other element in same nested object (commenter_types.commenter_type)

POST mention_usersv2/_update_by_query
{
  "script": {
    "inline": "ctx._source.commenter_types.ctype = ctx._source.commenter_types.commenter_type",
    "lang": "painless"
  },
  "query": {
    "constant_score" : {
        "filter" : {
            "exists" : { "field" : "commenter_types" }
        }
    }
  }
}

When i give in the above query - it unfortunately dont update. Can anyone guide in as if in case one want to achieve the above, how can we?

2

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