If you have entered in an entire line that is incorrect on the primary issuances sheet, you can delete that certificate or grant by going to the issuance page.
To delete a certificate or grant, navigate to its page and click the delete button. The easiest way to find the certificate or grant page is to search for the ID (CS-1, in this case) or the shareholder’s name in the top search bar. You can then click on the ID once you see it in the results. From this page, you can click the red “Delete” button from the Actions menu.