Issue with keyword aggregation following update to 6.0

Elastic Stack Kibana
9

Yay I figured it all out!

If anyone come across this post I had to the following request:

PUT /my_index/mappings/doc
{
  "_all": {
    "enabled": true
  },
  "properties": {
    "@timestamp": {
      "type": "date"
    },
    "@version": {
      "type": "text",
      "fields": {
        "keyword": {
          "type": "keyword",
          "ignore_above": 256
        }
      }
    },
    "index": {
      "type": "text",
      "fields": {
        "keyword": {
          "type": "keyword",
          "ignore_above": 256
        }
      }
    },
    "intent": {
      "type": "text",
      "fields": {
        "keyword": {
          "type": "keyword",
          "ignore_above": 256
        }
      }
    },
    "message_content": {
      "type": "text",
      "fields": {
        "keyword": {
          "type": "keyword",
          "ignore_above": 256
        }
      }
    },
    "message_type": {
      "type": "text",
      "fields": {
        "keyword": {
          "type": "keyword",
          "ignore_above": 256
        }
      }
    },
    "processing_time": {
      "type": "long"
    }
  }
}

And then I did the following request to apply the mapping to my stored documents:

POST /my_index/_update_by_query?pretty&conflicts=proceed&refresh

Thanks a lot @weltenwort for your help!