Bingo! So you are running Diablo and have the Chinook repository enabled, that's the exact reason you still get the update sign.

I mean, Diablo was meant to replace Chinook in every way. Besides being somehow compatible, many system libraries and binary programs have been replaced by updated version and others might even have been dropped.

In other words, you shouldn't have that Chinook repository enabled in your tablet running Diablo.

The same applies for people running Chinook, who shouldn't have the Diablo repositories enabled.