N8n Activation Key Has Already Been Used On This Instance ((install)) May 2026

Below is a full, structured review of what this error means, why it occurs, and how to resolve it. This message appears in n8n (a workflow automation tool) when you try to activate a paid license key (e.g., for n8n’s enterprise features) on a specific server instance, but that same key has already been activated on another instance.

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