phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'faa9d6708ea043e68ad1f3bb27d13e0a' 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 ('faa9d6708ea043e68ad1f3bb27d13e0a', -1, 1418948977, 1418948977, '36a7b6c9', 16, 0, 0)

Line : 292
File : sessions.php