HTTP/1.1 412 Precondition Failed
content-type: application/problem+json
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connection: close
date: Fri, 02 Oct 2026 00:56:34 GMT

{"type":"urn:arcadia:problem:revision_conflict","title":"Precondition Failed","status":412,"code":"revision_conflict","detail":"Project changed. Reload and review the current model before retrying.","current_revision":2}