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 ('843d6ba7d0677c2287896fd3cb19fe6a', -1, 1713606133, 1713606133, '12e1625d', 6, 0, 0)

Line : 187
File : sessions.php