phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('3db24561e2f881f88ee5bf9a4f0442e6', -1, 1711708236, 1711708236, '0351b8aa', -11, 0, 0)

Line : 187
File : sessions.php