ERR_NGROK_5127: The event type for each source must be unique within a subscription

What does ERR_NGROK_5127 mean?

ngrok returns ERR_NGROK_5127 with this message:

The event type for each source must be unique within a subscription.

Troubleshoot ERR_NGROK_5127 with your AI agent. Connect it to the ngrok MCP server, then ask what caused the error and how to fix it.

Email support@ngrok.com and include the error code.