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 ('aa6655e00c3be287262e3d59f2941df9', -1, 1713519806, 1713519806, '03810dc9', 3, 0, 0)

Line : 187
File : sessions.php