You can get this error because of eBay restrictions on revising an Item’s Duration.
The Revise Item validation criteria are:
For fixed-price listings:
- you can’t change Item Listing Duration if there is one object of the listings has been sold.
- you can’t change Item Listing Duration from ‘3, 5..30 days’ to ‘GTC’ and vise verse.
For auction type listings:
- you can’t change the Item Listing Duration if there is either a bid or the listing is ending within 12 hrs.