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 ('2aef20aacd24348cf0cc28052e2f9851', -1, 1714029328, 1714029328, '03ef5b05', -8, 0, 0)

Line : 187
File : sessions.php