{
  "at": "2026-09-14T14:28:14.532Z",
  "oldReaderRejectsNewField": true,
  "newReaderAcceptsOldAndNew": true,
  "syntheticOnly": true,
  "liveRegistrationReadsOrWrites": 0,
  "requirement": "Update cached readers before first live attribution write; old-reader rollback is incompatible with new records."
}