Click the 'i' Icon to view Product List upload information:
Common issues with product list
Click the 'i' Icon next to the product list, to view Product List upload information and find out which values do not match the values allowed by SiteLucent product lists.
My product list could not be processed because tag(s) are already in use by other product list(s) Please ensure that a tag (a combination of the column header + cell value) is only used in a single product list. To solve this issue, you can update this product list or disable the conflicting product list(s), if they're no longer used.