ERR_NGROK_SHIP_ENVIRONMENT_NAME_ALREADY_EXISTS: An environment named "NAME" already exists on this app - ngrok documentation

What does ERR_NGROK_SHIP_ENVIRONMENT_NAME_ALREADY_EXISTS mean?

ngrok returns ERR_NGROK_SHIP_ENVIRONMENT_NAME_ALREADY_EXISTS with this message:

An environment named "<NAME>" already exists on this app.

Where can I get more help with ERR_NGROK_SHIP_ENVIRONMENT_NAME_ALREADY_EXISTS?

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