"code": "CannotCreateNestedObjects",
	"target": "Unknown",
	"details": [
			"code": "CannotCreateNestedObjects",
			"number": 2402,
			"message": "-0- may not be created.",
			"description": "Please create -0- using a separate API call.",
			"faultCode": "Client",
			"helpLink": "",
			"severity": "Error"

A request to create a new entity cannot have a new object of a different type within the request. For example: a request to create a new item cannot include parameters in it as well.

Refer to the message description to see which nested object cannot be included in the request.