Once not long enough, I'd worked on 4 projects which was literally copied from the first made and changed parts of the customers and internal users according to

Once not long enough, I'd worked on 4 projects which was literally copied from the first made and changed parts of the customers and internal users according to each use of it. So, the main problem is bugs found in one project was found on the other 3 and I'd to fix the same bug! Codebases like this or from the OP is cool to learn how to not do certain things.