I tries re-installing Elasticsearch 6.3.0 on my local server, and installed Java JDK, the most recent one, then when I try to start the Elasticsearch from installation folder/6.3.0/bin/elasticsearch.exe the cmd screen opens and immedietely closes. Here is the error : Unrecognized VM option 'UseConcMarkSweepGC'
Here are a sample list for different operations you might need to do with elatsicsearch indices.
If you need to change the mapping of an elasticsearch index, then you have to remove it first and then re-create and re-index it again. Here is how you can do this in a Laravel application.