header *commonpb.Header,
clock *clockspb.VectorClock,
opTag := tag.WorkflowActionChildWorkflowStarted
if err := ms.checkMutability(opTag); err != nil {
return nil, err
}
if !ok || ci.StartedEventId != common.EmptyEventID {
ms.logWarn(mutableStateInvalidHistoryActionMsg, opTag,
tag.WorkflowEventID(ms.GetNextEventID()),