Defendants consent to inaccurate pre-sentencing report forfeited the argument, but did not waive the claim, and an undisputed error that affects the sentence rises to the level of plain error, requiring correction even when forfeited.
http://media.ca1.uscourts.gov/pdf.opinions/17-1702P-01A.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.