Made changes to check duplication of records.

Now it uses frt_list, eff_from and valid_upto.

Mohammed/Freight List/FreightList.sql

+-- Remove the existing Shipment foreign key referencing the old Freight List primary key
+ALTER TABLE shipment
+DROP CONSTRAINT FK_SHIPMENT_FRT_LIST;
+
+-- Remove the existing Freight List primary key based only on FRT_LIST
+ALTER TABLE freight_list
+DROP CONSTRAINT FREIGHT_LIST_X;
+
+-- Remove the old index associated with the previous primary key
+DROP INDEX FREIGHT_LIST_X;
+
+-- Create the new composite primary key using FRT_LIST and EFF_FROM
+ALTER TABLE freight_list
+ADD CONSTRAINT FREIGHT_LIST_X
+PRIMARY KEY (frt_list, eff_from);
+
+-- Configure the transaction ID to use FRT_LIST and EFF_FROM for uniqueness
+UPDATE transetup
+SET tran_id_col = 'frt_list,eff_from'
+WHERE tran_window = 'w_frt_list';