Last night a deleted a few products and it all seemed to be working fine, now I'm just being spammed with:


Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'Array' was given in /var/www/vhosts/mydomain.com/httpdocs/packages/core_commerce/models/order/product.php on line 6

It seems to appear in anything related to the shopping cart. Please help! Deadline for client is very soon.