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 ('bf5f6cd6c7a06d6a2f007146155b5c8a', -1, 1601367178, 1601367178, '12cf6a8e', 4, 0, 0)

Line : 187
File : sessions.php