ERR_NGROK_1646: Invalid endpoint configuration, OAuth provider PROVIDER email addresses must be unique, but a duplicate is present: DUPLICATE - ngrok documentation

What does ERR_NGROK_1646 mean?

ngrok returns ERR_NGROK_1646 with this message:

Invalid endpoint configuration, OAuth provider <PROVIDER> email addresses must be unique, but a duplicate is present: <DUPLICATE>.

Troubleshoot ERR_NGROK_1646 with your AI agent. Connect it to the ngrok MCP server, then ask what caused the error and how to fix it.

Where can I get more help with ERR_NGROK_1646?

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