phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'f3889c75389b0433dc5446b325a740ff' 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 ('f3889c75389b0433dc5446b325a740ff', -1, 1411490833, 1411490833, '365a6e3c', -1, 0, 0)

Line : 187
File : sessions.php