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 ('e8d0af521fc210c99e087569c0ee4668', -1, 1713613758, 1713613758, '12dc7e05', -8, 0, 0)

Line : 187
File : sessions.php