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 ('4191ce2b7d5b3b59a157f5a9d7b8c3c9', -1, 1713590207, 1713590207, '0389dda3', 5, 0, 0)

Line : 187
File : sessions.php