The code in your first post is NOT!!! an extract of the complete code. Your first post showed that v is a variable, In your complete code, v is declared an expression, and its elements are set to norm(...) which are convex. That is why the RHS of the inequality is convex, not affine.
Although the RHS is affine with respect to v, it is not affine with respect to the the optimization variables. It is convex with respect to the optimization variables.
I will assume that constraint, and hence your problem, is non-convex unless you show otherwise.