Some systems require that previous states of a Conditionare preserved for some time. A common use case is the acknowledgement process. In certain environments, it is required to acknowledge both the transition into Activestate and the transition into an inactive state. Systems with strict safety rules sometimes require that every transition into Activestate has to be acknowledged. In situations where state changes occur in short succession there can be multiple unacknowledged states and the Servermaintains ConditionBranchesfor all previous unacknowledged states. These branches will be deleted after they have been acknowledged or if they reached their final state.