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 ('740ab526e04e688fbca8ff0718e3d002', -1, 1714620157, 1714620157, '12da8164', 10, 0, 0)

Line : 187
File : sessions.php