MDG 6.1 Physical Address :Enter a value for attribute Search Term1

I am working on MDG 6.1 and we have a Portal and not using NWBC . IN our Development system while creating a customer master we are receiving Error to maintain Search term 1 field which never used to be mandatory and ECC still is not asking this field to be filled in .

Would you know what might have caused this error ?

Binoy