'Add a specific value from a log line to another log line in Logstash

Is it possible to transfer a certain value of a log line to another log line inside of the Logstash config?

I need the value RoundTripDuration of line CLIENT in the line of REQUEST

Current state:

CLIENT : Session: 97B31BBDBB793E62107178C911683FB4, RoundtripDuration: 185ms, ClientUpdate: 3 ms
REQUEST: Session: 97B31BBDBB793E62107178C911683FB4, Total: 163ms, Invoke: 126ms (#{d.d_9.GenericDialogUI}

Target state:

CLIENT : Session: 97B31BBDBB793E62107178C911683FB4, RoundtripDuration: 185ms, ClientUpdate: 3 ms
REQUEST: Session: 97B31BBDBB793E62107178C911683FB4, Total: 163ms, Invoke: 126ms (#{d.d_9.GenericDialogUI}, RoundtripDuration: 185ms
logstashelastic-stacklogstash-grokelk


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