ERR_NGROK_7047: Invalid edge module, OAuth provider PROVIDER email domains must be unique, but a duplicate is present: DUPLICATE - ngrok documentation

What does ERR_NGROK_7047 mean?

ngrok returns ERR_NGROK_7047 with this message:

Invalid edge module, OAuth provider <PROVIDER> email domains must be unique, but a duplicate is present: <DUPLICATE>.

Where can I get more help with ERR_NGROK_7047?

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