If you need to fix other fields settings for any field/object:

1. Click the Setup gear (upper right) and select Setup

2. Click the Object Manager tab (not the down-arrow) and select the object you need to fix from the list in the central panel

3. Click Fields & Relationships on the left-hand vertical menu

4. Click the name of the field you need to fix

5. Click the Edit button (upper middle)

6. Correct the setting(s) that were wrong

7. Click Save

8. Re-grade by using the App Launcher to open the Grader App and follow instructions to run the scoring routine again and then be sure to reload the page to see the updated error list & grade certificate