Delete default tag

I was searching for this porblem but I don`t find resolved.
On my every log in Logstash I have tag "beats_input_codec_plain_applied".

I`m add some my tags and this tag is very confusing.
Tag is my very important field and I want to delete this. How can I do this ?

I am use ELK stack.

Try this:

filter {
    if "beats_input_codec_plain_applied" in [tags] {
        mutate {
            remove_tag => ["beats_input_codec_plain_applied"]

I have this problem too.

I think you kan set filebeat fields_under_root: false or change add field name.

Yes, thank you. This help me.

在哪里设置? 说明白啊
Where to set up?