Hello @JLJERKY and thanks for reaching out!
Please ensure you have the Operation column filled out for the corresponding ITEM rows. To add items, you would need to use ADD, updating an item can be done by using APPEND and MODIFY is to be used for when you would need to add/remove information.
I've attached the Documentation - FUSE Quick Sheets in case it is needed. Please let me know if this helps, thank you.
