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 ('c8c389ee9e44ddca7c753c96e58709d3', -1, 1638036173, 1638036173, '035c1c34', -2, 0, 0)

Line : 187
File : sessions.php