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 ('6aa57fa155bd7abb22fffdf535d70871', -1, 1713501235, 1713501235, '340e79f2', -4, 0, 0)

Line : 187
File : sessions.php