phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb5_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('13b9bb3f9b94f82c9b8271c0c1eb19b6', -1, 1664631909, 1664631909, '12d0bb80', -4, 0, 0)

Line : 187
File : sessions.php