Who this affects
This issue affects users on the Amazon ledger system in ConnectBooks. If you do not use the ledger, your numbers are correct and no action is necessary.
What happened
Amazon reports inventory movements in the Inventory Ledger Summary report. Among the movement types is "unknown events". This type covers units that Amazon cannot match to a known reason, such as a receipt, a sale, or an adjustment.
Since August 13, the unknown events numbers in the Ledger Summary report are wrong. They do not agree with the Inventory Ledger Detail report. They do not agree with any other Amazon report.
Example: a SKU shows 400 units of unknown events in the Summary report. The Detail report shows 0 unknown events for the same SKU and the same date. Amazon gives no record of the 400 units.
This is a problem on the Amazon side. It is not a ConnectBooks calculation error.
What we did
We stopped the use of unknown events in all inventory calculations for users on the ledger. We also deleted the unknown event records that Amazon sent from August 13 and later.
Your inventory numbers now come only from movement types that Amazon reports correctly.
What you must check
The bad data was in the system from August 13 to August 25. If you did any of these tasks in that period, you might have to do the task again:
FBA adjustments. An FBA adjustment that you made for dates in this period can be based on wrong unknown event numbers. Double check if the numbers are correct and make sense.
Settlement exports. An export that you made for data in this period can contain wrong quantities. Delete the settlement for those dates and export it again.
If you did not do these tasks in this period, no action is necessary.
What happens next
We monitor the Amazon reports each day. When Amazon corrects the data, we will load the correct unknown events again.
If your numbers still look wrong after August 25, contact support.
Frequently asked questions
Does this affect me if I'm not on the Amazon ledger?
No. Your numbers are correct and no action is necessary.
Is this a ConnectBooks error?
No. The unknown events numbers in Amazon's Ledger Summary report are wrong.
Which dates should I check?
August 13 to August 25. Check FBA adjustments and settlement exports you made for those dates.
What do I do with a settlement export from that period?
Delete the settlement and export it again.