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STATUS_NOTIFICATION_GUID_ALREADY_DEFINED
A notification identifier is already assigned
STATUS_NOTIFICATION_GUID_ALREADY_DEFINED means the requested file already carries a notification GUID association. The operation attempted to define another association where the contract allows only one.
How to handle the conflict
- Query and compare the existing GUID with the requested value.
- Treat an identical existing association as idempotent only if the API contract permits it.
- Use the documented removal or replacement operation before assigning a different GUID.
- Serialize updates so two callers cannot define competing values concurrently.
Debugging note
This status commonly reveals replayed initialization, duplicated provisioning, or stale metadata left by a previous owner. Log the file identity and both GUIDs, but avoid altering on-disk metadata outside the supported interface.
References
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