Hi, I recently downloaded a system that the owner has put free for the public. That system is based on a library to lend books. I'm editing it to make a store with options to deliver products, the problem is that the system is designed in a way that if someone rents a book, another person can't ask for that book, the system will not let me order a product that someone else has already ordered.
This image shows the problem, if someone takes a product must have a single copy and it is automatically exhausted.
I want that any person can request x quantity of products although another person has already requested that same product.
I tried to change it in the database and php codes but I do not have the level of programming needed to be able to remove it, the page crashes, the system crashes, stops working if I try to change something related.
What part should I modify in order to achieve what I explained above?, I share a file with the system in case someone is interested in checking it : http://www.mediafire.com/file/77fzd1v8i6ruu6j/library-php-master.zip
Thanks in advance !!