DuplicateSystemForItem
Example
{
	"code": "DuplicateSystemForItem",
	"target": "Unknown",
	"details": [
		{
			"code": "DuplicateSystemForItem",
			"number": 1705,
			"message": "Multiple entries of system '-0-' found for item '-1-'.",
			"description": "An item can have only a single entry of any given system code. Please check your input.",
			"faultCode": "Client",
			"helpLink": "http://developer.avalara.com/avatax/errors/DuplicateSystemForItem",
			"severity": "Error"
		}
	]
}
Explanation

This error indicates that an item in this request has multiple entries for a given system code. Each item can have one entry per given system code. The API supports more than 100 classification systems inluding the Avalara Tax Code. See the 18.12 Patch Notes for more information about supported system codes.