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) VALUES ('709a3f2bf9d2e7b6d6a7b2d186f7f0db', -1, 1714336898, 1714336898, '0389dda3', 7, 0)

Line : 158
File : sessions.php