phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '01f116b5b05a38d5a0ad4bcfac13ad38' for key 1

INSERT INTO phpbb2_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('01f116b5b05a38d5a0ad4bcfac13ad38', -1, 1368915549, 1368915549, '1716d49e', 14, 0, 0)

Line : 187
File : sessions.php