System dealing with multiple selections that conflict

I am writing a web based application, in Vue.js. I am attempting to make a gun modification tool to assist new users in a game called Escape from Tarkov.

There are many different combinations that can be made on the website but how do I prevent and check when the user has selected an item that conflicts. Without going the long route of individually assigning what can and cant be done, surely programmers have created a systematic way of doing this?

An example would be a fashion website that allows you to mix and match. But some designers dont allow their brand to mix with others so you would have to check and prevent selections.