Error Applying Changes. Please Try Again.

I have a regular vigor and a Foil vigor in my collection, both marked as Near Mint.  If I try to change the foil one to lightly played and click Apply I get a message box in red along the top that says:
Error Applying Changes. Please Try Again.
It then deletes the foil Vigor from my collection.  I can add back a Near Mint one, but not a lightly played one without getting the same error.