This notification indicates that a validation rule has been triggered, which is typically shown by a red outline on the text box. However, if the column is hidden, the red marking won't be visible.
To resolve this, you can either unhide all columns in the line configuration or use the "Clear All" button and manually re-scan the needed fields.
How to hide/unhide columns in Xtracta.
After unhiding the Discount column, you will now see the red outline that indicates the source of the error:
