phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '43590f439ffc0678470c4f8bc84f42ad' 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 ('43590f439ffc0678470c4f8bc84f42ad', -1, 1397750137, 1397750137, '36f2c8ac', 84, 0, 0)

Line : 196
File : sessions.php