I'm using FeatureMerger to merge a Shape file and a CSV file, and outputting to a GeoJSON file. The merge works as it should, but is producing seven extra attribute columns that I don't want, even though none of the Format Attributes are selected in the Feature Type Properties settings (csv_line_number, csv_number_of_fields, csv_total_number_of_columns, multi_reader_full_id, multi_reader_id, multi_reader_keyword, multi_reader_type).
This is obviously making the GeoJSON larger than necessary. Can someone please tell me how to ensure these Format Attributes don't get written out to the final GeoJSON file?
Thanks!