vertice paint group not showing up

Hallo

Im in cycles and learning about vertice painting and principle shader. Ive been vertice painting. I added it to my object and this combined with a normal texture worked ok. Now ive painted a second area. The belt. and its not showing up in the render viewport. Here is chaotic screen print. i hope u can see what i mean.
[ATTACH=CONFIG]515537[/ATTACH]

and here is my blend file. You have to switch to vertice paint to see ive painted in the belt. [ATTACH]515538[/ATTACH]

lisa