eBusiness 11i to R12 upgrade: patch 6678700 giving: cannot insert NULL into ("PO"."PO_ATTRIBUTE_VALU

@/u06/OraApps12i/TPIDEV12/apps/apps_st/appl/po/12

     7  Run       AutoPatch R120 pl  poxukpol.sql                FAILED            10  Run       AutoPatch R120 pl  poxukpol.sql                FAILED        
    11  Run       AutoPatch R120 pl  poxukpol.sql                FAILED  

sqlplus -s APPS/***** @/u06/OraApps12i/TPIDEV12/apps/apps_st/appl/po/12.0.0/patch/115/sql/poxukpol.sql &un_po &batchsize 5 16
DECLARE
*
ERROR at line 1:
ORA-20000: poxukpol.sql 120.5: ORA-20000:
po.plsql.PO_R12_CAT_UPG_EXISTING_DOCS.process_new_po_lines,110,ORA-20000:
po.plsql.PO_R12_CAT_UPG_EXISTING_DOCS.create_line_attributes_tlp,030,ORA-01400:
cannot insert NULL into ("PO"."PO_ATTRIBUTE_VALUES_TLP"."DESCRIPTION")
ORA-06512: at line 178