phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'd5c46f7350a2d91e2af4226f471e354d' 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 ('d5c46f7350a2d91e2af4226f471e354d', -1, 1414166772, 1414166772, '36a1b531', -1, 0, 0)

Line : 187
File : sessions.php