VC5003: Not one of the choices
The value isn't one of the field's choices: a select value that's not an option (or not in its options source), a switch that's neither on nor off, a color outside its palette, or formatted text holding elements it can't (it keeps b, i, u, s, sub, sup, strong, em, del, a, br and span).
How to fix
Pick one of the choices. For formatted text, the fix unwraps the other elements.