Reference
CHECKOUT_NOT_STARTED
Checkout not started
Checkout not started
HTTP status 409 Conflict, code CHECKOUT_NOT_STARTED.
What it means#
You read the checkout of a cart that has not been checked out, and there is nothing this client can be asked before it is: there is no checkout to report yet. A read never starts a checkout.
What to do#
Check the cart out with POST .../checkout; its answer says what happens next.
On the wire#
Every error response carrying this code names this page in error.moreInfo,
with the request id in the query string. See Error codes for
the response shape and the list of every code.