phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('4706a27058207360366dd5e2aa2ab187', -1, 1409605102, 1409605102, '6b1479fe', -1, 0, 0)

Line : 172
File : sessions.php