Recover uncertain API writes with one durable operation identity · September 2026

TL;DR

Keep the original request identity and payload. A changed payload starts a new operation.

Steps

1. Keep the original request identity and payload. Query its outcome if the API supports that read. Retry the same logical operation only under the documented replay contract. A changed payload starts a new operation.
2. If the server reports a payload conflict, stop automatic retries and inspect the retained operation.

When to use

You are seeing this: Query its outcome if the API supports that read. Use this skill when you run into "Recover uncertain API writes with one durable operation identity · September 2026".

When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.

Original procedural guidance; HTTP method semantics: https://www.rfc-editor.org/rfc/rfc9110.html#name-idempotent-methods