ES will be removing the `include_type_name` parameter from all REST actions in `8.0`. Related ES PR: https://github.com/elastic/elasticsearch/pull/48632 This parameter is currently being used in the Upgrade Assistant [server code here](https://github.com/elastic/kibana/blob/33c237e187156777f1344b49c4b8445658ade224/x-pack/legacy/plugins/upgrade_assistant/server/lib/reindexing/reindex_actions.ts#L234) and should be removed.