phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4288142600f702ca5a3e9fe26eb5f96b' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('4288142600f702ca5a3e9fe26eb5f96b', -1, 1406703645, 1406703645, '36d3c941', 64, 0, 0)

Line : 192
File : sessions.php