ERR_NGROK_SHIP_INTEGRATION_CREDENTIAL_VALUE_DUPLICATED: Credential value NAME is sent more than once - ngrok documentation

What does ERR_NGROK_SHIP_INTEGRATION_CREDENTIAL_VALUE_DUPLICATED mean?

ngrok returns ERR_NGROK_SHIP_INTEGRATION_CREDENTIAL_VALUE_DUPLICATED with this message:

Credential value <NAME> is sent more than once.

Where can I get more help with ERR_NGROK_SHIP_INTEGRATION_CREDENTIAL_VALUE_DUPLICATED?

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