# Reindex multiple downsampled indexes into one cause invalid start/end\_time

**URL:** <https://discuss.elastic.co/t/reindex-multiple-downsampled-indexes-into-one-cause-invalid-start-end-time/353546>\
**Category:** Elasticsearch\
**Created:** [February 19, 2024, 7:01am UTC](https://discuss.elastic.co/t/reindex-multiple-downsampled-indexes-into-one-cause-invalid-start-end-time/353546 "2024-02-19T07:01:41Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![VietDuc](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vietduc/32/121888_2.png) [@VietDuc](https://discuss.elastic.co/u/VietDuc)\
**Post date:** [February 19, 2024, 7:01am UTC](https://discuss.elastic.co/t/reindex-multiple-downsampled-indexes-into-one-cause-invalid-start-end-time/353546/1 "2024-02-19T07:01:41Z")

</div>

Hi Everyone,  
I have a TSDS index and already downsample many backing indexes. Now, i want to reindex some of my downsampled indexes into 1 index (to reduce number of backing index). While it is possible by using `POST _reindex` Api, however when checking the destination index,

```auto
"time_series": {
        "end_time": "9999-12-31T23:59:59.999Z",
        "start_time": "-9999-01-01T00:00:00Z",
        "es87tsdb_codec": {
          "enabled": "true"
        }
      },

```

It seems that the start\_time and end\_time is not correct. I expect that if those indexes are sibling and could make continuous time range, start and end time would be the earliest and latest.

Do you have solution for this one? Do i have to update those manually somehow?

Best regards,

---

<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:** [March 18, 2024, 7:02am UTC](https://discuss.elastic.co/t/reindex-multiple-downsampled-indexes-into-one-cause-invalid-start-end-time/353546/2 "2024-03-18T07:02:05Z")

</div>

Closed on March 18, 2024, 7:02am UTC

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