# Upgrading - Compatibility Elasticsearch 2.x, mappings

**URL:** <https://discuss.elastic.co/t/upgrading-compatibility-elasticsearch-2-x-mappings/33461>\
**Category:** Elasticsearch\
**Created:** [November 1, 2015, 12:19pm UTC](https://discuss.elastic.co/t/upgrading-compatibility-elasticsearch-2-x-mappings/33461 "2015-11-01T12:19:28Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![lwintergerst](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/lwintergerst/32/18164_2.png) [@lwintergerst](https://discuss.elastic.co/u/lwintergerst)\
**Post date:** [November 1, 2015, 12:19pm UTC](https://discuss.elastic.co/t/upgrading-compatibility-elasticsearch-2-x-mappings/33461/1 "2015-11-01T12:19:29Z")

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Hi,

I would like to update my elasticserach to the latest version, but have a few questions.

Can I still use Kibana 3.x (we use 3 and 4 in parallel at the moment, but more 3)

or do I HAVE to use Kibana 4?

I also currently have some mapping issues to take care of. What would happen if I delete all indices with issues, start ES 2.0 and then try to index fields with dots in the name? Will ES just refuse to index them?

Thanks,

Luca

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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:** [November 1, 2015, 8:39pm UTC](https://discuss.elastic.co/t/upgrading-compatibility-elasticsearch-2-x-mappings/33461/2 "2015-11-01T20:39:01Z")

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ES 2.0 only support KB 4.2.

And yes, it will reject document with those fields.

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**Author:** ![lwintergerst](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/lwintergerst/32/18164_2.png) [@lwintergerst](https://discuss.elastic.co/u/lwintergerst)\
**Post date:** [November 2, 2015, 7:41am UTC](https://discuss.elastic.co/t/upgrading-compatibility-elasticsearch-2-x-mappings/33461/3 "2015-11-02T07:41:00Z")

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Thanks, that helps a lot

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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:** [July 5, 2017, 11:41pm UTC](https://discuss.elastic.co/t/upgrading-compatibility-elasticsearch-2-x-mappings/33461/4 "2017-07-05T23:41:22Z")

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