How to replace @timestamp field in logstash aggregate filter map

I'm using the logstash aggregate filter. When the map is pushed upon timeout, I want to set the @timestamp field to be a specific valu.

I've tried using timeout_code => event.set('@timestamp', "2021-06-10T19:00:00.000Z").
I've tried this with Time.utc(2021, 6, 10, 19, 0, 0), and Time.utc(2021, 6, 10, 19, 0, 0).to_i
I've tried using the date filter both before and after the aggregate filter.

I either get nothing, or it spews out errors saying it doesn't like me trying to change the @timestamp field.

What can I do to update the @timestamp?



@timestamp has to be a LogStash::Timestamp. You could try

event.set("@timestamp",, 6, 10, 19, 0, 0))

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