All fields are mapped as text

Elastic Stack Logstash
2

I think either of 2 ways, either use logstash mutate convert

  mutate {
    convert => { "fieldname" => "integer" }
  }

Or in a template that matches index "procmon-*" that defines field mappings.

However, you can't change the existing index, it's good that it's a daily index. You will likely get conflicts in the Kibana index pattern after the changes.