What common mistake do developers make with Factory state, why does the mistake cause problems, and what is the safer approach?

What common mistake do developers make with Factory state, why does the mistake cause problems, and what is the safer approach? One recurring problem with factory state is applying it without understanding the boundary it protects. Relying only on Laravel validation for uniqueness and never protecting the data with an appropriate database constraint. In addition, Factory states can represent conditions such as inactive, verified or paid records. Safer engineering approach: keep the responsibility in the correct layer, use the framework's supported API, validate and authorize inputs, avoid hidden side effects, and verify the behavior with tests.