When importing Bill Payments, the Check # field is automatically populated in the UI after the successful import. Here is what I tried: 1. Deleting the Check No. column in the CSV file 2. Including the Check No. field but empty and is mapped against NetSuite Check No. field 3. Same with 2 but is not mapped anyway 4. Setting the default value to empty on the Field Mapping page 5. Setting the default value to NULL on the Field Mapping page