constraint

The write violates a database constraint.

Common causes

• A duplicate value in a UNIQUE column, a failed CHECK, or a foreign key that does not match.

How to fix

Change the conflicting value and retry.

Response

{
  "type": "https://castra.mehmetozer.dev/problems/constraint",
  "title": "…",
  "status": 409,
  "detail": "…"
}

detail says what exactly went wrong for this request.