# Mapping in Elasticsearch

**URL:** <https://discuss.elastic.co/t/mapping-in-elasticsearch/75729>\
**Category:** Elasticsearch\
**Created:** [February 20, 2017, 12:27pm UTC](https://discuss.elastic.co/t/mapping-in-elasticsearch/75729 "2017-02-20T12:27:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ANU\_SARA\_VARGHESE](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/anu_sara_varghese/32/51487_2.png) [@ANU\_SARA\_VARGHESE](https://discuss.elastic.co/u/ANU_SARA_VARGHESE)\
**Post date:** [February 20, 2017, 12:27pm UTC](https://discuss.elastic.co/t/mapping-in-elasticsearch/75729/1 "2017-02-20T12:27:22Z")

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Hi,

In my ELK setup, I am getting mapping conflict. I had change my index name from unix-\* to logstash-\* . I have about 3 TB of data in my setup and I can't loss them. So I did not delete the old index, this gave me an error of

courier fetch: shards failed

So I rename my index to the original name and it is working fine now.

How can I remove the mapping conflict without deleting my old index ?

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [February 20, 2017, 9:16pm UTC](https://discuss.elastic.co/t/mapping-in-elasticsearch/75729/2 "2017-02-20T21:16:37Z")

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You will need to reindex.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 20, 2017, 9:16pm UTC](https://discuss.elastic.co/t/mapping-in-elasticsearch/75729/3 "2017-03-20T21:16:40Z")

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