IMO you have a manufacturing defect or "2nd". An error is when one or more of the manufacturing run (not the entire run) has a missing color or other missing things from the original design. This could include a missing insert for example. Another error would be two different sides when both should be the same, like a $5 on one side and a $25 on the other. An error is not when the entire run of chips has a misspelled word or wrong date.