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 ('6e99bbf19d12d01c22ab4652e36c264b', -1, 1582961306, 1582961306, '03e3fcbf', 3, 0, 0)

Line : 191
File : sessions.php