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 ('b439ef6e1fa9ad2dc2e562d9684e556f', -1, 1632161934, 1632161934, '23accb57', 6, 0, 0)

Line : 187
File : sessions.php