phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '862733ed7df4ee7b3de22032dd59e3fc' for key 1

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('862733ed7df4ee7b3de22032dd59e3fc', -1, 1409353101, 1409353101, '36cd6347', -1, 0, 0)

Line : 187
File : sessions.php