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 ('68fe6a9e94d4afc42a28fdae83578476', -1, 1713981519, 1713981519, '039102b8', -8, 0, 0)

Line : 187
File : sessions.php