Does a court's failure to stay execution of a sentence under section 654 of the Criminal Code for possession of burglary tools constitute forfeiture of the sentence?

^4. As an initial matter, we note the lack of an objection by defendant to the trial court's imposition of a concurrent sentence on the possession of burglary tools count does not constitute forfeiture of the section 654 issue. "It is well settled . . . that the court acts 'in excess of its jurisdiction' and imposes an 'unauthorized' sentence when it erroneously stays or fails to stay execution of a sentence under section 654." (People v. Scott (1994) 9 Cal.4th 331, 354, fn. 17.) Accordingly, a claim of error under section 654 is not subject to forfeiture principles.