ERS check via LSMW

Hi Gurus,

I have created LSMW for creating purchase order, I have done the setting as well for ERS check. (Checked required field in Vendor master)

When I am trying to create the PO manually then ERS check box is checked automatically.

But when I am trying to create through LSMW then its not checked, The field "XERSY" is also not available "Maintain Field Mapping and Conversion Rules"

How I can checked it through LSMW.

Kindly confirm

Thank you so much.

Best Rgegards,

Mayank Tyagi