Former state Sen. Dianne Wilkerson and prosecutors are asking a federal judge to move up her sentencing date to Sept. 14.

The sentencing is currently scheduled for Sept. 21.

In a joint court filing Wilkerson and prosecutors with U.S. Attorney Carmen Ortiz's office state that one of Wilkerson's attorneys has a conflict on Sept. 20, and Sept. 14 is the "nearest date that the Court and all counsel are available."

Sept. 14 is the same day voters go to the polls for Democratic and Republican primaries.

The next court date -- for a status update on the case -- is August 20 at 10:30 a.m. in Courtroom One at the Moakley Courthouse in South Boston.

A Roxbury Democrat who had represented the Second Suffolk District from 1993 to 2008, Wilkerson pleaded guilty in June to eight counts of attempted extortion, which included taking $23,500 in bribes. Prosecutors are recommending up to four years in prison and three years of supervised release.