duplicate_id

HTTP 409. Duplicate id.

When you see it

You supplied an id on create and a row with it already exists (in your account, or anywhere: row ids are unique across accounts).

What to do

Supplying your own id is how you make a create idempotent, so this usually means the write already succeeded. Fetch the row and carry on.

The body

type is https://devs.inittasks.com/errors/duplicate_id. instance is the path that failed, here /v1/todos. For the full RFC 9457 shape, the request_id field and the retry rules, see errors and retries.