# Upgrade from 6 to 7: This index has more than one mapping type, which is not supported in 7.0

**URL:** <https://discuss.elastic.co/t/upgrade-from-6-to-7-this-index-has-more-than-one-mapping-type-which-is-not-supported-in-7-0/231220>\
**Category:** Elasticsearch\
**Created:** [May 5, 2020, 8:58pm UTC](https://discuss.elastic.co/t/upgrade-from-6-to-7-this-index-has-more-than-one-mapping-type-which-is-not-supported-in-7-0/231220 "2020-05-05T20:58:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![gdreyv](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/gdreyv/32/67658_2.png) [@gdreyv](https://discuss.elastic.co/u/gdreyv)\
**Post date:** [May 5, 2020, 8:58pm UTC](https://discuss.elastic.co/t/upgrade-from-6-to-7-this-index-has-more-than-one-mapping-type-which-is-not-supported-in-7-0/231220/1 "2020-05-05T20:58:10Z")

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I faced the error "This index has more than one mapping type, which is not supported in 7.0. This index must be reindexed into one or more single-type indices." How can I do this? I'm ok to convert `_type` into the property `type`. What should I do for it?

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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:** [June 2, 2020, 8:58pm UTC](https://discuss.elastic.co/t/upgrade-from-6-to-7-this-index-has-more-than-one-mapping-type-which-is-not-supported-in-7-0/231220/2 "2020-06-02T20:58:19Z")

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