Error 21920350: Condition information does not exist or is not a valid condition for category.

The only supported item conditions for Sports Trading Cards Singles are Graded (ID 2750), Ungraded (ID 4000), and Used (ID 3000). If the item condition is set to Graded, you will also have to use the ConditionDescriptors container to provide the professional grader and the grade of the card. If the item condition is set to Ungraded, you will have to use the ConditionDescriptors container to provide more details on the condition of the ungraded card.