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 ('a2d457775c0fad0b5eb7e8b3f1ffc011', -1, 1714035471, 1714035471, '340ef0b2', 5, 0, 0)

Line : 187
File : sessions.php