You can't revise an active item without a valid ItemID or SKU number.
Why this happens
Specific eBay error condition affecting how the listing is processed — see the linked official article in eBay's developer reference for the exact mechanism.
How to fix it
Open the linked eBay developer reference for the specific error number to read the full description.
Identify the affected listing(s) in your seller account and review the offending field.
Make the necessary corrections through your listing tool, API call, or seller hub.
Resubmit and confirm the error clears in the response or in your listing-quality dashboard.
Common pitfalls
Assuming eBay errors auto-resolve — most require an active correction and resubmission