phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8c240ceedb58eeae5c853fa218f611d7' 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 ('8c240ceedb58eeae5c853fa218f611d7', -1, 1228148820, 1228148820, '26673f3b', 401, 0, 0)

Line : 193
File : sessions.php