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

What common mistake do developers make with Database seeders, why does the mistake cause problems, and what is the safer approach? One recurring problem with database seeders is applying it without understanding the boundary it protects. Putting environment-specific secrets or irreversible production cleanup logic into a seeder that developers may run accidentally. In addition, Seeders can insert required reference data such as roles, statuses, categories or demonstration 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.