# Migrate data 6.4 \> 6.8 \> 7.2

**URL:** <https://discuss.elastic.co/t/migrate-data-6-4-6-8-7-2/191623>\
**Category:** Elasticsearch\
**Created:** [July 22, 2019, 11:21am UTC](https://discuss.elastic.co/t/migrate-data-6-4-6-8-7-2/191623 "2019-07-22T11:21:37Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![mattsdevop](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mattsdevop/32/45160_2.png) [@mattsdevop](https://discuss.elastic.co/u/mattsdevop)\
**Post date:** [July 22, 2019, 1:47pm UTC](https://discuss.elastic.co/t/migrate-data-6-4-6-8-7-2/191623/2 "2019-07-22T13:47:26Z")

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This might help you

> [@Kibana: mapping set to strict, dynamic introduction of \[references\] within \[doc\] is not allowed](https://discuss.elastic.co/t/kibana-mapping-set-to-strict-dynamic-introduction-of-references-within-doc-is-not-allowed/176403/27):
>
> I believe they closed this github issue already that I started (link is found few posts back). I do not know exactly , why it happened, but as I tried it again, I managed to get this to work. If you're still having problems, you should open an issue etc.. Raul

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