# "Multiple mapping types and custom mapping types in index templates" issue when upgrading to v8
**URL:** https://discuss.elastic.co/t/multiple-mapping-types-and-custom-mapping-types-in-index-templates-issue-when-upgrading-to-v8/349185
**Category:** Elasticsearch
**Created:** [December 12, 2023, 6:25pm UTC](https://discuss.elastic.co/t/multiple-mapping-types-and-custom-mapping-types-in-index-templates-issue-when-upgrading-to-v8/349185 "2023-12-12T18:25:03Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@preetish\_P](https://discuss.elastic.co/u/preetish_P)
#### Post date: [December 12, 2023, 6:25pm UTC](https://discuss.elastic.co/t/multiple-mapping-types-and-custom-mapping-types-in-index-templates-issue-when-upgrading-to-v8/349185/1 "2023-12-12T18:25:03Z")
Hi folks,
We are in the process of upgrading ELK stack from version 7.17.2 to 8.9.2. When going through the list of **Elasticsearch deprecation issues** I spotted the below in Prod: (not seen in non-prod)
```auto
Multiple mapping types and custom mapping types in index templates and indices are deprecated
Update or remove the following index templates before upgrading to 8.0: [.monitoring-alerts-2, .monitoring-data-2, .monitoring-es-2, .monitoring-kibana-2, .monitoring-logstash-2, .watch-history-6, .watch-history-7].
See https://ela.st/es-deprecation-7-removal-of-types for alternatives to mapping types.
```
However, I can neither find any index templates nor indices matching the above. Where is this being reported from !!
Can someone please advice if I can go ahead with the upgrade, will it cause problem in starting elasticsearch application ? I cannot try this in non-prod as it did not report this problem.
Thank you
---
### Author:  [@preetish\_P](https://discuss.elastic.co/u/preetish_P)
#### Post date: [December 14, 2023, 2:46pm UTC](https://discuss.elastic.co/t/multiple-mapping-types-and-custom-mapping-types-in-index-templates-issue-when-upgrading-to-v8/349185/2 "2023-12-14T14:46:36Z")
Apparently the index templates were available in dev tools.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [January 11, 2024, 2:46pm UTC](https://discuss.elastic.co/t/multiple-mapping-types-and-custom-mapping-types-in-index-templates-issue-when-upgrading-to-v8/349185/3 "2024-01-11T14:46:59Z")
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