Overview

Sellers encounter error 100389 when they try to create a fulfillment‑only listing that references an ASIN already flagged for non‑fulfillment sales. The conflict stops the listing from going live, delaying inventory availability and potential revenue. Resolving the mismatch quickly is essential for maintaining uninterrupted sales flow.

Key Points

• ASIN classification mismatch — The error is triggered when a non‑fulfillment ASIN is used in a fulfillment‑only submission, causing Amazon’s catalog to reject the entry.
• Incorrect fulfillment selection — Selecting “Fulfilled by Amazon” for an ASIN that Amazon has marked as merchant‑fulfilled generates the same conflict.
• Separate listings required for dual use — A single ASIN cannot simultaneously support both fulfillment models; sellers must maintain two distinct listings, each with the proper ASIN type.
• Bulk‑upload feeds need revision — Changing the ASIN directly in the Seller Central UI does not fix a feed file; the spreadsheet must be edited, re‑validated, and re‑uploaded.
• Verification before submission saves time — Running an ASIN‑type check prior to creating or updating listings prevents the error from appearing in the first place.

How to Resolve Error 100389

1. Identify the offending ASIN — Open the rejection notice, note the ASIN listed, and confirm its current fulfillment classification in the “Inventory → Manage Inventory” page. For example, ASIN B07XYZ123 may show “Merchant‑fulfilled” while you attempted a Fulfilled‑by‑Amazon listing.
2. Remove the ASIN from the fulfillment‑only draft — Delete the problematic ASIN from the listing form or from the feed row. Continuing with the same draft will cause the system to reject the submission again.
3. Create a fresh fulfillment‑only listing — Start a new product entry using an ASIN that Amazon already designates as fulfillment‑eligible, such as ASIN B08ABC456. This ensures the catalog treats the item as FBA‑only from the outset.
4. Validate the ASIN’s eligibility — Before saving, use the “Check ASIN” tool or view the product detail page to verify the “Fulfilled by Amazon” badge appears. If the badge is missing, the ASIN cannot be used for a fulfillment‑only listing.