Revision conflict

1 min read

Canonical type:

https://learn.peios.org/wispist/problems/revision-conflict/

Status: 412 Precondition Failed. Browser code: revision_conflict.

The mutation's HTTP precondition did not match current state:

• If-None-Match: * was used to create an ID that already exists.
• If-Match carried an older revision for replacement or deletion.

Fetch or wait for the latest document, reconcile the user's intent, then submit a new conditional mutation using that revision. Never loop blindly: another caller may have made a meaningful conflicting change.

The browser client's replace, update, and delete methods accept an observed document envelope so safe concurrency is the normal path.

Edit this page