phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6a4e96cdb11868e1bf34e9e1dc2251af' for key 1

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('6a4e96cdb11868e1bf34e9e1dc2251af', -1, 1228207230, 1228207230, '26673f3c', 14, 0, 0)

Line : 187
File : sessions.php