LicenseKeyNameAlreadyExistsForAccount
Example
{
	"code": "LicenseKeyNameAlreadyExistsForAccount",
	"target": "Unknown",
	"details": [
		{
			"code": "LicenseKeyNameAlreadyExistsForAccount",
			"number": 612,
			"message": "Please use a unique license key.",
			"description": "The license key name provided is a duplicate of an existing license key.",
			"faultCode": "Client",
			"helpLink": "http://developer.avalara.com/avatax/errors/LicenseKeyNameAlreadyExistsForAccount",
			"severity": "Error"
		}
	]
}
Explanation

The license key name provided is a duplicate of an existing license key on the account that is being used. Please check your license key and try again.