You can delete data in [Scan History].
Please note that [Scan History] is linked to the actual files in the save destination folder. If you delete data from [Scan History], the corresponding files in the save destination folder will also be deleted.
Note: Items displayed under [Document type] and [Tags] are also linked to the files in the save destination folder. Deleting data in these categories will also delete the corresponding files from the save destination folder.