--ABS-56932/ ABS-56951

ALTER TABLE CONTRACTPRODUCTBILLING
  DROP CONSTRAINT INVENTORYBILLINGTYPE_VALID1_1;

ALTER TABLE CONTRACTPRODUCTBILLING
  ADD CONSTRAINT INVENTORYBILLINGTYPE_VALID1_1
  CHECK ((INVENTORYBILLINGTYPE BETWEEN 0 AND 4 AND INVENTORYBILLINGTYPE IS NOT NULL) OR INVENTORYBILLINGTYPE IS NULL);