Problem in inbound JDBC Adapter

My scenario is like sending data from SAP to database through JDBC adapter.

but when i tried to excute my program it is giving follwing message:

Error processing request in sax parser: Error when executing statement for table/stored proc. java.sql.SQLException: ORA-00001: unique constraint (STSC.UDT_PRICELOCZONE_CPK) violated

i am sure there is no duplicate records.

can anyone tell me what the problem?