IGBT Switching Loss Modeling

Hello,
I am trying to create a custom IGBT model through the device editor. For the turn on loss curve I am able to create a curve for 25 C at 500 V but when I try to create another curve for 25 C at 1000 V. An error saying I can’t have duplicate temperatures for the model even though I am changing the Vce settings under “Other Test Conditions”. Does PSIM only allow for linear scaling with voltage for switching loss?

Thank you,
Peter