You can see such an error text when place orders on AliExpress.
Often the error occurs when the Ali2Woo extension tries to place an order on AliExpress and expects that the original product has the variation but it can’t find that variation on the product on AliExpress.
It happens if a seller on AliExpress changed the product after the order was created on your website. That operation breaks the mapping between your order and the product.
Therefore, in this case, we recommend just place that order manually.
Also, you don’t need to reimport such a product from AliExpress. If you have the synchronization enabled, Ali2Woo will update the variants of your product automatically and all new orders should be placed without the problem.