How to delete data complete?

hi all,
i have using
curl -XDELETE to delete indices and delete (logstash-log-) index from kibana ,
but when i create the index (logstash-log-
) again , why the old field for the index (logstash-log-*) is still exist ? and have *.raw fields ?
how to delete data and field from kibana complete ?

If they are showing up after you delete the data and then recreate the index with new data, then those fields exist because they need to. ie the data has those fields.

but the same field have *.raw fields too ?
for example ,

afield and afield.raw

Yes, the template that LS uses does this/