# Failed to parse mapping: Root mapping definition has unsupported parameters **URL:** \ **Category:** Elasticsearch\ **Tags:** language-clients\ **Created:** [January 4, 2024, 6:50am UTC](https://discuss.elastic.co/t/failed-to-parse-mapping-root-mapping-definition-has-unsupported-parameters/350358 "2024-01-04T06:50:12Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![LuongQuocKhang](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/luongquockhang/32/130515_2.png) [@LuongQuocKhang](https://discuss.elastic.co/u/LuongQuocKhang)\ **Post date:** [January 4, 2024, 6:50am UTC](https://discuss.elastic.co/t/failed-to-parse-mapping-root-mapping-definition-has-unsupported-parameters/350358/1 "2024-01-04T06:50:12Z")
0 I'm having an issue when create index with mapping. It returns "Failed to parse mapping: Root mapping definition has unsupported parameters" - .NET Core version 8.0 - [Elasticsearch.Net](http://Elasticsearch.Net) version 6.8.11 - NEST version 6.8.11 ![image](https://us1.discourse-cdn.com/elastic/original/3X/8/e/8ed4f8285681cbd8eff4b24e692f22f73183dc93.png) ![image](https://us1.discourse-cdn.com/elastic/original/3X/7/9/7992fe5c90cba33bc256a556e183bfb4d9658d1b.png) ![image](https://us1.discourse-cdn.com/elastic/original/3X/0/d/0d0447f8f324dd8d398f113db1f7e05e3af863d3.png) ![image](https://us1.discourse-cdn.com/elastic/original/3X/8/f/8f0ca049b006e1ff99ed03f862fdd9d08b606d52.png) please help me this issue, thank you I can create index without mapping but when i added mapping, it returns error ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [February 1, 2024, 6:50am UTC](https://discuss.elastic.co/t/failed-to-parse-mapping-root-mapping-definition-has-unsupported-parameters/350358/2 "2024-02-01T06:50:19Z")
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