Before upgrading Create an assignment and set this assignment's grading method to Marking guide. Define the assignment's marking guide. Enter some criteria. Under the Frequently used comments section, leave the first comment entry as it is and click Add frequently used comment . This will insert a second row. Enter AA . Save the marking guide and make it ready. Navigate to Assignment administration => Advanced grading and check the Frequently used comments section. Confirm that it has 2 rows. 1 empty and 1 row with the AA comment. Upgrade Upgrade your site with the patch included. Confirm that the upgrade process ends successfully. Navigate to the assignment, and click Advanced grading under Assignment administration. Check the Frequently used comments section. Confirm that it now only has a single row with the AA comment. Edit the assignment's marking guide definition. Under the Frequently used comments section, click Add frequently used comment to add a new comment entry but do not enter anything. Click Add frequently used comment again to add another comment entry and enter blank spaces only. Click Add frequently used comment again to add another comment entry and enter Comment 1 . Save the marking guide. Navigate to Assignment administration => Advanced Confirm that there is only AA and Comment 1 listed in the Frequently used comments section.