phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '16329c023a3033acf27270704fe46b8b' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('16329c023a3033acf27270704fe46b8b', -1, 1432360114, 1432360114, '3691ad24', -4, 0, 0)

Line : 187
File : sessions.php