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 ('ffd6fec5ac9c64d5bafebf64820f5ea0', -1, 1730419227, 1730419227, '1277ac4b', -1280, 0, 0)

Line : 195
File : sessions.php