A PHP Error was encountered

Severity: Notice

Message: Trying to get property 'parent_id' of non-object

Filename: shop/Shop_model.php

Line Number: 15

Backtrace:

File: /var/www/vhosts/polimar.com/bps.polimar.com/app/models/shop/Shop_model.php
Line: 15
Function: _error_handler

File: /var/www/vhosts/polimar.com/bps.polimar.com/app/controllers/shop/Shop.php
Line: 102
Function: getCategoryTreeIDs

File: /var/www/vhosts/polimar.com/bps.polimar.com/index.php
Line: 302
Function: require_once