How to define dynamic date formats in index template

[RamanGupta16 (Raman Gupta)]

I tried to customize the dynamic_date_formats as part of Index template in ElasticSearch version 6.7.2. But I am facing issues:-

PUT _template/template_1
{
  "index_patterns":"*",
  "version": 1,
  "mappings": {
    "dynamic_date_formats": ["yyyy/MM/dd HH:mm:ss Z||yyyy/MM/dd Z||dd/MM/yyyy||yyyy-MM-dd HH:mm:ss||yyyy-MM-dd||yyyy-MM-dd'T'HH:mm:ss||yyyy-MM-ddTHH:mm:ss"]
  },
  "settings": {
    "number_of_shards": 5,
    "mapping.ignore_malformed": true
    }
}

Error:

{
  "error": {
    "root_cause": [
      {
        "type": "illegal_argument_exception",
        "reason": "Malformed [mappings] section for type [dynamic_date_formats], should include an inner object describing the mapping"
      }
    ],
    "type": "illegal_argument_exception",
    "reason": "Malformed [mappings] section for type [dynamic_date_formats], should include an inner object describing the mapping"
  },
  "status": 400
}