Direct selling is the business of recruiting new members and making commissions on their purchases. As a result of globalization, this type of marketing has become more popular as it allows people to make money where markets are closely linked together via social media. It provides an opportunity for people to make money by signing up as users and recruiting other members. With the help of the internet, anyone can start a direct selling business without having a physical store or office location.  When a person likes to join this business, he may go through a problem called concurrency registration problem. 

Because of the popularity of direct selling business, many people are interested to register in the industry. The concurrency registration problem occurs when more than one people try to register concurrently. In concurrency registration problem, when a user has attempted to register with a company but has been met with an error message that states "User already exists." The reason for this issue is that there may be someone else who is already registered themselves under the same company name. 

The concurrency problem creates a lot of frustration and anxiety for all those waiting in line because there are too many people with similar needs at the same time. The queue system override method is a solution to the problem of concurrency in direct selling systems. In this method, each member is entered to the system in a FIFO queue order. This method is not only an effective way to solve the problem but also helps each member have their time slot and they won't be frustrated with waiting endlessly for their turn.