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PEER_S_ALREADY_A_MEMBER
Peer identity is already a member
PEER_S_ALREADY_A_MEMBER is HRESULT 6488070 (0x00630006) from winerror.h. The documented description is “Already a member.” In the Windows Peer-to-Peer graph, group, event, connection, or subscription state, the value reports a nonfailure state that must not be collapsed into plain S_OK.
This result is actionable completion information and may require waiting, reconciliation, fallback, or user disclosure.
Where the status is encountered
- Peer Graphing data-store creation and connection; capture the exact API, object, and phase because the same numeric success severity does not define the state by itself.
- Peer group membership and event processing;
- Record subscriptions and offline synchronization;
What must be true before accepting it
Verify that the existing membership matches the intended group, identity, role, and credentials. The caller should reject a path where outputs and state do not match the recorded condition.
Correct handling and recovery
Reuse the membership and refresh its current state instead of issuing another join. Re-enroll only when identity or role differs.
Difference from nearby results
Already-connected concerns an active connection; already-a-member concerns durable membership.
Using one generic success branch for this result and its neighbor can lose output, repeat work, or misreport completion.
Practical scenario
A setup wizard attempts to join a collaboration group twice. It finds the same member identity and proceeds to connect without creating duplicate credentials.
References
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