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 ('a3c60aaef504244a2758b7ecf95306ce', -1, 1767808468, 1767808468, '54ccfc03', 2, 0, 0)

Line : 187
File : sessions.php