How to handle dot in fields (Missing intermediate object)

Elastic Stack Elasticsearch
1

Hello,

Elasticsearch version: 8.8.2

I have an index template with runtime fields:

"dynamic": "runtime"

When i add a document to index with dotted field (bash.command.test),
its added normally as a runtime field:

 "runtime": {
        "bash.command.test": {
          "type": "keyword"
        }
      },

I changed the template with lowercase normalizer for case insensitive search:

"dynamic": "runtime",
"dynamic_templates" : [
    {
      "lowercase_dynamic_fields" : {
        "match" : "*",
        "match_mapping_type" : "string",
        "mapping" : {
          "normalizer" : "lowercase",
          "type" : "keyword"
        }
      }
    }
  ],

When i add a doc to new index, i got an error:

"error": {
          "type": "illegal_state_exception",
          "reason": "Missing intermediate object bash"
        }

Full requests and responses are here

I added this option to /etc/sysconfig/elasticsearch file but the error is still here (according to this doc):

export ES_JAVA_OPTS="-Dmapper.allow_dots_in_name=true"

I can't change the fields names like this: bash_command_test. Because i have too many fields and it depends other applications.
How can i fix this?