WASHINGTON Attorneys for former Trump campaign chairman Paul Manafort accidentally revealed in a court filing Tuesday that the special counsel team led by Robert Mueller has alleged their client lied about sharing polling data with a Russian operative.

Manaforts lawyers in a poorly redacted court filing responding to the special counsels claim that Manafort broke his September 2018 plea agreement by lying to investigators inadvertently revealed that Muellers team alleged that Manafort lied about sharing polling data with [Konstantin Kilimnik] related to the 2016 presidential campaign.

Kilimnik , who worked closely with Manafort, is believed to have close ties to Russian intelligence. Kilimnik was named alongside Manafort in a superseding indictment in June in connection with alleged witness tampering and obstruction of justice.

Manaforts attorneys Kevin Downing, Thomas Zehnle and Richard Westling contend in the filing that Manafort, a longtime lobbyist who has worked on several Republican presidential campaigns, has provided complete and truthful information to the best of his ability since entering into his plea agreement. They disagree with the Mueller teams claim that the former campaign chairman made intentional misstatements. Manaforts incarceration, the filing states, has taken a toll on his physical and mental health, as hes developed depression, anxiety and severe gout.

Seeking to explain any inconsistencies in his testimony, the lawyers say Manafort has awoken before dawn on days hes met with the special counsels office, and had not had an opportunity to review materials in his jail cell the night before his interviews. Mistakes and failed recollections, the filing states, are common to most proffer meetings between the government and cooperating witnesses.