ERR_NGROK_SHIP_REGISTRY_CREDENTIAL_APP_CONFLICT: Credential ID is the pull credential of COUNT apps: NAMES - ngrok documentation

What does ERR_NGROK_SHIP_REGISTRY_CREDENTIAL_APP_CONFLICT mean?

ngrok returns ERR_NGROK_SHIP_REGISTRY_CREDENTIAL_APP_CONFLICT with this message:

Credential <ID> is the pull credential of <COUNT> apps: <NAMES>. Point them at another credential first.

Where can I get more help with ERR_NGROK_SHIP_REGISTRY_CREDENTIAL_APP_CONFLICT?

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