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 ('593481dd0a94785bd9e76a96a6f19413', -1, 1714085104, 1714085104, '0a020003', -9, 0, 0)

Line : 187
File : sessions.php