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 ('4c5f2f10c4c75fe0b9957f3ef2d19bbf', -1, 1775391172, 1775391172, '54ccfc03', -9, 0, 0)

Line : 187
File : sessions.php