Failed to clone service

[noguxun]

$ fastlyctl clone 2IKm0LvZtbAeF5z1asxy3H 5p6qvVv6bKK0MZqaBUtj6o --v 47
Copying 2IKm0LvZtbAeF5z1asxy3H version 47 to 5p6qvVv6bKK0MZqaBUtj6o version 23...
Copying 1 backend
Copying 1 setting
Copying 1 vcl
Copying 4 snippets
Copying 1 logging/syslog
400: Bad API request--something was wrong with the request made by FastlyCTL. Method: POST, Path: /service/5p6qvVv6bKK0MZqaBUtj6o/version/23/logging/syslog
Message from API: {"msg":"Bad request","detail":"No condition named ''"}

[noguxun]

@smaeda-ks do you think your #19 can fix above problem too?