gshop crashing server

Hello, am curently using this sgshop editor: http://puu.sh/5lfq3.png

I got no idea why the server keeps crashing after I patch it. I didn't even add stuff to the boutique, just moved some items to diferent subcategories. And ofc I export everytime as 1.4.4 client and sev as well.

Am I doing something wrong? Or maybe I need a newer gshop editor I have no idea..

Hope someone can help, thanks for viewing my help request!

the event boutique has items with 0 cost, that is what is most likely crashing it