# Upgraded to Elasticsearch 7.8.0 and now date fields are in fields key instead of \_source

**URL:** <https://discuss.elastic.co/t/upgraded-to-elasticsearch-7-8-0-and-now-date-fields-are-in-fields-key-instead-of-source/239137>\
**Category:** Elasticsearch\
**Created:** [June 29, 2020, 3:10pm UTC](https://discuss.elastic.co/t/upgraded-to-elasticsearch-7-8-0-and-now-date-fields-are-in-fields-key-instead-of-source/239137 "2020-06-29T15:10:47Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Federico\_Foschini](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/federico_foschini/32/31209_2.png) [@Federico\_Foschini](https://discuss.elastic.co/u/Federico_Foschini)\
**Post date:** [June 29, 2020, 3:10pm UTC](https://discuss.elastic.co/t/upgraded-to-elasticsearch-7-8-0-and-now-date-fields-are-in-fields-key-instead-of-source/239137/1 "2020-06-29T15:10:47Z")

</div>

Hello,  
I've upgraded my cluster from 6.8.0 to 7.8.0. This is my template:

```auto
{
    "index_patterns": [
        "example-*"
    ],
    "settings": {
        "number_of_shards": 1,
        "number_of_replicas": 0,
        "refresh_interval": "20s",
     }
    "mappings": {
        "dynamic": false,
        "properties": {
            "@timestamp": {
                "type": "date"
            }
       }
   }
}

```

When I save my document this is what I get:

```auto
"_index": "example-000001",
  "_type": "_doc",
  "_id": "gV2ZAHMBqN3Ho-B9PIfj",
  "_version": 1,
  "_score": null,
  "_source": {
    "@timestamp": "2020-06-29T15:01:49.000Z"
  },
  "fields": {
    "@timestamp": [
      "2020-06-29T15:01:49.000Z"
    ]
  },
  "sort": [
    1593442909000
  ]
}

```

What is this new `fields` key I see on my documents? I hadn't it on my old elasticsearch 6.8.0.

I did some testing and I've found that every field I define in my template using `date` ends up inside `fields` key on the document

---

<div class="post-metadata">

**Author:** ![Federico\_Foschini](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/federico_foschini/32/31209_2.png) [@Federico\_Foschini](https://discuss.elastic.co/u/Federico_Foschini)\
**Post date:** [June 30, 2020, 4:15pm UTC](https://discuss.elastic.co/t/upgraded-to-elasticsearch-7-8-0-and-now-date-fields-are-in-fields-key-instead-of-source/239137/2 "2020-06-30T16:15:30Z")

</div>

Does anyone have an hint on how to resolve this issue?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 28, 2020, 4:15pm UTC](https://discuss.elastic.co/t/upgraded-to-elasticsearch-7-8-0-and-now-date-fields-are-in-fields-key-instead-of-source/239137/3 "2020-07-28T16:15:31Z")

</div>

Closed on July 28, 2020, 4:15pm UTC

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