Warning when using search function

[TimLivin]

Hi,

When I use the search function of our webshop - www.livinflame.com - I receive the following warning :

"Warning: Function getFormatedName() is deprecated in /var/www/vhosts/livinflame.com/httpdocs/controllers/front/listing/SearchController.php on line 77
in /var/www/vhosts/livinflame.com/httpdocs/classes/Tools.php on line 2694"

The search function itself works, because I do get my search results. I haven't done any big changes in Prestashop, nor changed something in the code somewhere. 

Anybody knows what this warning means and how to solve it?

Kind regards,

Tim