1) Создаю индекс PUT /users

{
	"mappings": {
		"properties": {
			"user_id": {
				"type": "long"
			},
			"user_name": {
				"type": "keyword"
			}
		}
	}
}

{
	"users": {
		"aliases": {},
		"mappings": {
			"properties": {
				"user_id": {
					"type": "long"
				},
				"user_name": {
					"type": "keyword"
				}
			}
		},
		"settings": {
			"index": {
				"routing": {
					"allocation": {
						"include": {
							"_tier_preference": "data_content"
						}
					}
				},
				"number_of_shards": "1",
				"provided_name": "users",
				"creation_date": "1627511149266",
				"number_of_replicas": "1",
				"uuid": "rWhuwuLoTvKAWw3DAfY6Yg",
				"version": {
					"created": "7130499"
				}
			}
		}
	}
}

{
	"user_id": 1,
	"user_fio": "Ivanov"
}

{
	"error": {
		"root_cause": [
			{
				"type": "illegal_argument_exception",
				"reason": "Rejecting mapping update to [users] as the final mapping would have more than 1 type: [_doc, user]"
			}
		],
		"type": "illegal_argument_exception",
		"reason": "Rejecting mapping update to [users] as the final mapping would have more than 1 type: [_doc, user]"
	},
	"status": 400
}