title: mapper [user_agent.version] cannot be changed from type [text] to [keyword]" How to disable this mapper?
body: <p>I'm newbie to elasticsearch. What I want to do is to gather logs with filebeat from kubernetes cluster and send them to elasticsearch. My filebeat config file looks like this:</p>
  <pre><code>filebeat.yml: |
    filebeat.inputs:
    - type: container
      paths:
        - /var/log/containers/*.log
      processors:
      - add_kubernetes_metadata:
          host: ${NODE_NAME}
          matchers:
          - logs_path:
              logs_path: &quot;/var/log/containers/&quot;
  </code></pre>
  <p>I am outputting to elasticsearch,but I cant show the config. I don't have access to elasticsearch instance I only have access to kibana where I can add index pattern to match logs from elasticsearch.
  I see logs from file beat where it's written that:</p>
  <blockquote>
  <p>&quot;Failed to parse mapping [_doc]: mapper [user_agent.version] cannot be
  changed from type [text] to
  [keyword]&quot;,&quot;caused_by&quot;:{&quot;type&quot;:&quot;illegal_argument_exception&quot;,&quot;reason&quot;:&quot;mapper
  [user_agent.version] cannot be changed from type [text] to
  [keyword]&quot;}}</p>
  </blockquote>
  <p>What I found in docs is this: <a href="https://www.elastic.co/guide/en/elasticsearch/reference/7.17/user-agent-processor.html" rel="nofollow noreferrer">https://www.elastic.co/guide/en/elasticsearch/reference/7.17/user-agent-processor.html</a>
  , but I can't find how to disable this processor or even better how to omit this one field which is causing the error.</p>
  <p>I would highly appreciate any help.</p>