помогите пожалуйста
где ошибка ?

db2 "UPDATE BUF_COL_PRODUCT as B SET PRODUCT_ID = (SELECT N.PRODUCT_ID FROM COL_PRODUCT as N WHERE N.CODE=B.CODE)"

DB21034E The command was processed as an SQL statement because it was not a
valid Command Line Processor command. During SQL processing it returned:
SQL0407N Assignment of a NULL value to a NOT NULL column "TBSPACEID=2,
TABLEID=39, COLNO=0" is not allowed. SQLSTATE=23502

db2 "SELECT COLNAME ,COLNO, NULLS FROM SYSCAT.COLUMNS WHERE TABSCHEMA='WEBUSER' AND TABNAME='COL_PRODUCT' ORDER BY COLNO"

COLNAME COLNO NULLS
---------------- ------- -----
PRODUCT_ID 0 N
CODE 1 N

db2 "SELECT COLNAME ,COLNO, NULLS FROM SYSCAT.COLUMNS WHERE TABSCHEMA='WEBUSER' AND TABNAME='BUF_COL_PRODUCT' ORDER BY COLNO"
COLNAME COLNO NULLS
---------------- ------- -----
PRODUCT_ID 0 N
CODE 1 N

спасибо ошибка в глове была

:(