This message is shown when you are trying to create the Cloud project node under another name. The fact is that LoadComplete does not allow renaming its predefined project nodes. You can specify only custom names for cloud instances. For more information, see Creating Custom Amazon Machine Images for Load Testing.
To avoid this message, we recommended that you keep the default name for the created node - Cloud.
See Also
About Load Testing on Cloud Computers
Creating Custom Amazon Machine Images for Load Testing
Running Load Tests on Cloud Computers - Tutorial