Grok Parsing numeric field as "NUMBER:field_name:float" , still Kibana showing string field

HI Team ,

In my logstash conf file i am parsing fields with grok , and numeric field with - "NUMBER:field_name:float".

But Kibana is still showing this field as string in my index .

Value coming in this field will be like - 5.8978

Please let me know what needs to be done to parse this field as numeric .

Thanks and regards,

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