Listing Mirror keeps track of your inventory based on what you manually enter as your quantity, while also taking into consideration any orders that are filled through your various inventory sources. On occasion, you may see that you've managed to get a negative quantity (Seeing -1). That can be alarming. Here are five reasons why this may be happening.
1. An order hasn't been pushed to a fulfillment center
If you have fulfillment warehouse quantity syncing to a channel but do not have auto fulfillment turned on, you may experience negative quantity. Because Listing Mirror sees that you have QTY in the fulfillment warehouse (FBA or Deliverr), we are giving that QTY to the marketplace. Normally, when the order comes in, we would route it to the FBA or Deliverr warehouse and remove QTY there. However, if auto fulfill isn't enabled, we will default to taking the QTY out of your MF (merchant fulfilled) inventory source. If that MF inventory source is 0 when the order comes through, you will see a negative. Once you send the order to the fulfillment center, we will take the QTY from that inventory source, and your MF QTY will return to 0.
2. You aren't managing your inventory in Listing Mirror
If you have another inventory management software that is not integrated with Listing Mirror, that usually means that you are not updating your inventory in Listing Mirror. When orders come in, we will still "pull" the item from your MF (merchant fulfilled) inventory source, which may result in negative QTY. You can adjust this if you would like to, but it's not necessary.
3. The expected inventory source cannot fill an order
If there is an issue with getting the order to the fulfillment center (the order came from out of country, so Amazon cannot fulfill it), then we will default to taking the item out of your MF (merchant fulfilled) inventory source, which can also result in negative quantity. You can fill the order yourself if you have stock or cancel the order. If the order is canceled on Listing Mirror, you will need to adjust the inventory manually back to 0.
4. You have listings not tracked in Listing Mirror
These are listings that exist on the marketplace but were not created in or imported to Listing Mirror. If the SKU exists in Listing Mirror, but we are not managing the market listing then that SKU is not getting inventory updates. So, if your QTY goes to 0 from being sold on other marketplaces, we cannot tell the "untracked" listing that it's at 0. You may sell an item on that marketplace that is "untracked," which could then cause the QTY in Listing Mirror to be negative.
*All listings should be in Listing Mirror to avoid "untracked" listings and negative quantity.
5. The product oversold
You will rarely experience an oversell. However, it is a possibility. You can review this article to understand the different reasons you may experience and oversell - I don't have quantity. How did I get an order?
If you have any questions about negative quantity, please reach out to our support team!