HRESULT 0x80190199 (HTTP_E_STATUS_CONFLICT): meaning and diagnosis

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The server returned HTTP 409 Conflict because the request conflicts with current resource state.

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HTTP_E_STATUS_REQUEST_TIMEOUT	HTTP_E_STATUS_GONE

HTTP_E_STATUS_CONFLICT

HTTP_E_STATUS_CONFLICT maps to HTTP 409 Conflict. The request could not be completed because it conflicts with the current state of the target resource, and the response should contain enough information for the user or client to recognize the source of conflict.

What to check

Fetch the current representation and compare version, state, or ownership fields with the attempted change.
Use conditional requests such as If-Match with an entity tag when the API supports optimistic concurrency.
Resolve the conflicting change deliberately rather than automatically overwriting newer server data.

RFC 9110: 409 Conflict

RFC 9111: HTTP caching

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