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 ('80cc9a6d19bf8f2e0050fb1821c0936a', -1, 1728635855, 1728635855, '03ec56b8', -7, 0, 0)

Line : 187
File : sessions.php