Detach child incident as an auto action

Hi,

I was asked to check if it is possible to create "Duplicate Incident" action. All seems ok, - I can use "create child" to create new incident, then I'd like to detach child from parent to have them separated (to prevent resolving new one, when parent is resolved)

I'm trying to use auto action "detach child" but getting error message: "Error calling buissnes function. Buissnes function DetachChildIncident class type incidentManagement was called without proper object."

Is it possible to use "detach child" as an auto action? If yes, how to do it?