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 ('e38db9cd3d3542d09d726df9a7f7ccfb', -1, 1713930151, 1713930151, '12d9dc72', -9, 0, 0)

Line : 187
File : sessions.php