Add record in lookup that record will add in subgrid too of same entity.

HELLO,

I have a custom entity A in which there is a lookup(for Primary Address) and subgrid(for Other Addresses) of entity Address. My requirement is to add Primary Address record in subgrid which is add to lookup(on Change).Also I will add other record of address in subgrid.

Thanks in Advance

Regards

Nishkarsh