phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO forum_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('f8d7714f99e5cbf13e8969d4bb31e5bc', -1, 1752463994, 1752463994, 'd849d813', -1, 0)

Line : 158
File : sessions.php