Error 21916884: Item condition is required for this category. Please provide a supported condition value.

This category requires that you provide a valid condition ID value in the ConditionID field. To view valid condition IDs for the category, you can use the getItemConditionPolicies method, and pass in your category ID as a value in the filter query parameter. The supported conditionId and corresponding conditionDescription values are returned under the itemConditions array.