I have upgraded from 6.0.0 to 6.7.2. We initially experienced a problem where the type field was pushing 2 types out which we resolved by adding a new template in Elasticsearch.
I have checked the logstash logs where I am still seeing:
Attempting to install template {:manage_template=>{"template"=>"logstash-*", "version"=>60001
How do I tell Logstash to use the new template name I created in ElasticSearch which is logstash_1