@plonka2000 You would need to re-index your existing data. It takes a bit of work and the way you accomplish the task varies by your technology. Basically you read the data out of ES then re-write it to a new index. See the links below.
https://www.elastic.co/guide/en/elasticsearch/guide/current/reindex.html
http://david.pilato.fr/blog/2015/05/20/reindex-elasticsearch-with-logstash/
In the future this will be easier to do: https://github.com/elastic/elasticsearch/issues/15201