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 ('a1395f50fb92d0a96501bc2b4e286a97', -1, 1638316751, 1638316751, '035c1c34', 0, 0, 0)

Line : 187
File : sessions.php