Sequentially adding standalone Proxmox estates with the same native node name could lend the first site agent to the second through the short-hostname fallback. Both provider nodes then shared one agent identity and collapsed into one state slot. Require exact endpoint, certificate, or agent-bridged full endpoint evidence before a cross-instance standalone merge; reject and self-heal guessed links that already belong to another node.
Refs #1753
Contract-Neutral: narrows internal Proxmox node/agent identity reconciliation without changing API shapes or extension contracts
pulse-triage[bot]
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