business partner replication

I am replicating business parnter, I get the the following error in bdoc

Sales area 3020 14 00 is not defined for customers

not sure where from it took this sales area.

secondly, if some are is missing it has to take from sample customer from table

TCRMBP_REFCUST

I tried to maintain this table by sm30( not allowing due to the fact it has to come from customizing)

what is the cutomizing node for this?