Does a waiver based on a failure to notify appellant of his right to a restitution hearing constitute error?

^7. Even assuming the court erred in failing to notify appellant of his right to a restitution hearing, such error was harmless. "'[A]n uninformed waiver based on the failure of the court to advise an accused of the consequences of an admission constitutes error which requires that the admission be set aside only if the error is prejudicial to the accused.' [Citation.]" (People v. Walker (1991) 54 Cal.3d 1013, 1022-1023.) Furthermore, appellant knew the approximate amount of the restitution the victim claimed and defense counsel could have contested it at the disposition hearing, but failed to do so, thus waiving the error. (Id. at p. 1023 ["when the only error is a failure to advise of the consequences of the plea, the error is waived if not raised at or before sentencing"].)