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 ('605a6d47c4c40dd2767e33922910f22d', -1, 1711624858, 1711624858, '22e4a8c8', 7, 0, 0)

Line : 187
File : sessions.php