That does not make sense.
An amendment to a Constitution CANNOT be Constitutional until it is ratified, in this case, by the voters..
If we amend the US Constitution to allow slavery, it cannot be ruled “unconstitutional.”
Amendments change things - now it may have ruled that the method of garnering those votes or the method of placing the issue before the voters was unconstitutional, but not the ratified will of the voters.
Our Supreme Courts are not elected. You’ve got trouble in Rivr City with a capital T and that rhymes with G and that stands for gay marriage.