ERR_NGROK_SHIP_REGISTRY_CREDENTIAL_PUBLISH_TARGET_CONFLICT: Credential ID is the push credential of COUNT publish targets - ngrok documentation

What does ERR_NGROK_SHIP_REGISTRY_CREDENTIAL_PUBLISH_TARGET_CONFLICT mean?

ngrok returns ERR_NGROK_SHIP_REGISTRY_CREDENTIAL_PUBLISH_TARGET_CONFLICT with this message:

Credential <ID> is the push credential of <COUNT> publish targets. Point them at another credential first.

Where can I get more help with ERR_NGROK_SHIP_REGISTRY_CREDENTIAL_PUBLISH_TARGET_CONFLICT?

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