Error in logstash date filter in kibana

Hi,
I am parsing log file and one of my field is :

2020-06-26 12:56:15.258

A part of conf file in logstash is :


grok {
        match => {
		"message" => "%{TIMESTAMP_ISO8601:logdates}"
					}
			}
			date {
				match => [ "logdates","yyyy-MM-dd HH:mm:ss.SSS" ]
				target => "logdates"
				timezone => "CET"
		}

But when I go to Kibana, I can only see @timestamp for a Time Filter when creating my Index Pattern. Any ideas on what I am doing wrong?

Really appreciate any help.

Can you check the mapping of the index? If there is no logdates field, this is a Logstash problem, not a Kibana problem.

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