Table t512w_o modification required

Hi Experts,

I am implementing Payroll for a country which don't have any existing country version in SAP. I have copied the required things from International payroll.

But in case of wage types processing classes, Evaluation classes and Cumulation classes have not been copied against copied wage types.

It is tried to make changes through t512w_o against country grouping NP but all fields against processing classes, Evaluation classes and Cumulation classes are grayed where no changes are possible.

Kindly suggest me the best option to make the required changes.

Thanks & Regards

Bindu P