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 ('d2c090d729a9e1af292b36dee5fd0e0b', -1, 1713307074, 1713307074, '12e3a184', -4, 0, 0)

Line : 187
File : sessions.php