Validation-error Memes

When your database schema is so optimized that you're using the country field as a unique identifier. Who needs UUIDs when you can just... limit the entire planet to one user per nation? Someone clearly took "normalization" a bit too literally and decided that countries should have a one-to-one relationship with users. India with 1.4 billion people? Sorry, someone already claimed it. Better luck next reincarnation. Plot twist: The developer probably used country as a primary key thinking "this will never be a problem" and now they're frantically Googling "how to migrate production database without getting fired."