Logstash - how to remove strings within a field (whose content itself a raw string)?

I have a event that consists of various fields, one of which is called "raw_message". This field's contents is a raw string eg.

Input:

raw_message: "Raw user details:: [location:london name:kris wu id:L3j5k category:vip]"

Output:

raw_message: "Raw user details:: [location:london category:vip]"

I would like to remove name and id from this field. I understand remove_field doesnt work for the mutate or filter plugin since that function removes the entire field which is not what I'm looking for.

You may be able to do it using mutate+gsub.

Thanks for the reply. Correct me if i misunderstood gsub, but wouldnt it only replace the highlighted field?

i.e.

 filter {
      mutate {
        gsub => [
          # replace all forward slashes with underscore
          "raw_message", "name", "****",
        ]
      }
    }

input:

raw_message: "Raw user details:: [location:london name:kris wu id:L3j5k category:vip]"

output:

raw_message: "Raw user details:: [location:london ****:kris wu id:L3j5k category:vip]"

You could try something like

mutate { gsub => [ "raw_message", "name:\w+ ", "" ] }