Magento Importer error: Option2 cannot be blank and 1 option values given but 2 options exist by Carolyn Wilson

Hi,

I am trying to import a Magento shop, but of the hundreds of products, only about 5 have succeeded, while the rest get the error: Option2 cannot be blank and 1 option values given but 2 options exist.

How can I fix this?

Thanks.

CW