conflict
HTTP 409 Conflict
A resource with the same unique identifier already exists (e.g., duplicate slug or idempotency key collision).
PATCH /v1/codes/:id also answers 409 when other requests changed the same code during every save attempt. Reload the code and send the change again.
POST and DELETE /v1/codes/:id/logo also answer 409 when another request changed the same code’s logo at the same moment. They then change nothing.