It should cache for an hour, I think (based on a quick look at nodebb package manager code). So yes - you have to wait a bit before the nbbpm refreshes. You can just install the updated version manually by using npm install <package name> from the command line in NodeBB folder.
Take a look at how we store users. We increment a global user id each time a new user is created and store the user data in an object with the name user:<userId> and we store the userId in a sorted set. You need to do something similar for businesses.
Everytime a new business is created assign it a unique id and store it at business:<businessId> and then also store it for the user at uid:<uid>:businesses.
It would look something like below in nodebb code. This is obviously pseudocode.