Hello all! First time poster, but a big fan of ElasticSearch in general.
I'm trying to configure Auto Completion for an index, following these steps from the docs (https://www.elastic.co/guide/en/elasticsearch/guide/current/_index_time_search_as_you_type.html), but they seem to apply to creating a new index. In my case, I already have an index that I want this token filter to be applied to. Is this possible, or do I need to create a new index with the Filter and Analyzer at the same time?