(83)In order to ensure that the internal model is up to date and reflects their risk profile in the best possible manner, insurance and reinsurance undertakings should be aware of the relevant actuarial developments and the generally accepted market practice of risk modelling. However, this does not imply that insurance and reinsurance undertakings should always adapt their internal model to the generally accepted market practices. In many cases it might be necessary to depart from the generally accepted market practice in order to arrive at an appropriate internal model.