Aggregate inactivity_timeout must be lower than timeout error

[coda]

Hi!

Could someone please help me on this? The following aggregate:

aggregate {
    task_id => "%{postfix_queueid}"
    code => "
        if event.get('@timestamp')
            map['@timestamp'] = event.get('@timestamp')
        end
        map['postfix_to_list'] ||= []
        map['tags'] ||= []
        map['events'] ||= []
        if event.get('postfix_to')
            map['postfix_to_list'] << event.get('postfix_to')
        end
        map['events'] << event.to_hash
    "
    push_map_as_event_on_timeout => true
    timeout => 300
    inactivity_timeout => 15
    timeout_code => "
         event.set('postfix_to', event.get('postfix_to_list'))
    "
    timeout_tags => ['aggregated']
}

is throwing a "ConfigurationError: Pipeline aborted due to error {:exception=>#<LogStash::ConfigurationError: Aggregate plugin: For task_id pattern %{postfix_queueid}, inactivity_timeout must be lower than timeout>,....... }"

If I remove the inactivity_timeout variable, it starts working again, and I can't understand what's wrong..

Thanks in advance!!