Acting Supreme Court Justice Michael Obus, who has overseen the courts that handle Manhattan felonies for eight years, is being replaced due to “philosophical differences” with the Office of Court Administration, a spokesman for the agency confirmed Thursday.

Lucian Chalfen said in an interview that Obus’ one-year appointment as administrative judge of the criminal term of New York County Supreme Court would not be renewed. He said a replacement hasn’t been selected yet, and that Obus would remain in the post until someone else was named after the first of the year.