php notice when new Account is saved


I have set up an instance on my localhost. It is all set up but when I try to create a new Account it results in the php notice error.
This is what the error_log says -
[Thu Mar 07 13:40:22.847009 2019] [php7:notice] [pid 4208] [client] PHP Notice:  Undefined index: rname in /var/www/html/*foldername*/include/SugarFields/Fields/Relate/SugarFieldRelate.php on line 284.

Instance details:
Sugar version 8.3 professional.

Any idea how to resolve it?


Shantanu Agnihotri