Change poiner activation for field SORT2 in vendor master - Outbound Idoc

Hello All,

Tried to activate change pointer for field SORT2 in vendor master which is XK01 but couldn't work rest of all fields are working fine.

Maintained in BD52 as like object is ADDREES, table is ADRC and field is SORT2 as this field is not available in LFA1.

Please guide me as it is bit urgent.