Upload the cSV multiple times

Elastic Stack Logstash
1

Hi ,
i am planning to load a CSV file with a set of data in logstash. then after 1 hour i want to upload the same CSV file again.

so let me know how to delete the old set of data in logstash and upload the new CSV so that there is no duplciate rows

2

Logstash doesn't store any data so there's nothing to delete. If Logstash by any chance writing the documents to Elasticsearch?