Why am I receiving a 422 error when completing a draft order through the admin rest API?

Technical Q&A
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Topic summary

A developer is encountering a 422 Unprocessable Entity error when attempting to complete a draft order via Shopify’s Admin REST API.

Error Details:

  • Error message: “There was an issue completing this order. Please try again.”
  • Error ID provided: eb3245f0-e955-410a-aa22-7f212a9bcb57
  • Using Shopify API version: October23

Technical Context:

  • The code uses shopifyAppClient.api.rest.DraftOrder.complete()
  • Only GET call precedes the complete operation
  • Draft order webhook updates are received with the same data

Key Issue:
The confusing behavior is that the draft order cannot be completed through the Shopify admin interface either (not just via API), even before the complete() request is made. This suggests the problem may be with the draft order’s state or data rather than the API implementation itself.

Status: Unresolved - seeking help to identify the root cause of why draft orders cannot be completed.

Summarized with AI on November 13. AI used: claude-sonnet-4-5-20250929.
1

Hi, I met troubles while trying to complete the draft order through the admin rest API.

I receive:

"

Received an error response (422 Unprocessable Entity) from Shopify:
“There was an issue completing this order. Please try again.”
If you report this error, please include this id: eb3245f0-e955-410a-aa22-7f212a9bcb57

"

This functionality seems to be not working before.

I’m using October23 version and do it like this:

      let draftOrder = await shopifyAppClient.api.rest.DraftOrder.find({session, id});
            await draftOrder.complete({});

The confusing behaiviour is that I cannot complete this order from shopify admin(not API) not only after .complete() request from api, but even before it(when I set my application on debug before this .complete line)

The error from shopify: “There was an issue completing this order. Please try again.”

The only call I have before this is GET draft-order.

Besides that, I receive draft-order update webhook with the same data

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