Hi,
The Stack XML has source and target level information. And generally if there is any mismatch between XML and components to be deployed , the SUM is terminated.
So, now if you are also updating your kernel with stack using SUM, do not go for manual update, let SUM do it.
However, if your XML is not used for updating kernel, you should update your kernel before running SUM.
Regards,
Divyanshu