Well I did as you suggested and deleted the attribute "buff_Fort-total" from the Attributes list, but the sheet did NOT re-create it. I closed and reopened the sheet, then refreshed Roll20, then went back out to My Games page and re-entered, but no luck. That Attribute is not there now. UPDATE: Curiously, even though that attribute is nowhere to be found in the list now, the Buff I had in place that added to my Fort save is now working.....I'd love to know how. UPDATE AGAIN: Aaaaaand now "buff_Fort-total" is there again, as if by magic. It definitely was not the last three times I opened the sheet. Well, I'm not going to look a gift horse in the mouth, seems to be working as intended now, I just hope it stays that way.