How do I repair a 5e Roll 20 character sheet?

One of my players has typed over the number in his Constitution Ability when he received an Amulet of Health, instead of letting the system up the score to 19. It seems to have broken something because now Amulet does not effect the score even when I replace his number back to the original number. Is there a way to fix this without creating a new character sheet? Thanks!

The Amulet of Health does not currently modify the character sheet or set the constitution score. You can either add it manually in the settings or change the Amulet of Health to do it (steps shown below). To add that functionality to the Amulet of Health do the following:  1) Hover over the weight on the Amulet of Health, click the information circle.  2) On the "Mods" line add: "; Constitution: 19" (without quotes) 3) Close the edit by clicking the information circle again. 

Thank you!