Cutting over without double-counting inventory
Close a purchase order in Stocky before you mark the imported copy as Ordered in Stockie. Both write incoming stock to the same Shopify products, so an order left open in both counts the same delivery twice.
This is the one migration mistake that corrupts real inventory numbers, and it is easy to make because nothing warns you.
The order to work in
- Import your purchase order history into Stockie
- Check the imported orders look right
- Close the matching orders in Stocky
- Mark the Stockie copies as Ordered
- Receive everything in Stockie from then on
Receive in one system only
From cutover, pick Stockie and stop receiving in Stocky. Receiving in both adds the same units to Shopify twice, and the discrepancy is hard to unpick weeks later.
The same applies to Shopify's own purchase orders and transfers - if they are writing incoming stock for the same delivery, that is another source of double counting.
If it has already happened
Symptoms: incoming quantities in Shopify that are roughly double what you ordered, or available stock that jumped twice for one delivery.
To trace it, open the product in Shopify and look at its inventory adjustment history. That shows what wrote to the variant and from where, which usually makes the duplicate obvious.
If the duplicate was only ever ordered, closing it releases the incoming it was holding. On a partly received order, closing releases just the part still outstanding - units already received stay as available stock, which is what you want.
If the delivery was actually received twice, do both, in this order:
- Unreceive the duplicate. That takes the extra units back out of available stock - and puts them back into incoming, because Stockie now expects them again
- Close that purchase order, which clears the incoming the unreceive just restored
Doing only the first leaves you with phantom incoming stock, which is the same problem in a quieter form.
Average cost is a separate reason to be careful
If you are also switching on average cost tracking, receiving outside Stockie skews the running average rather than just the quantity. Finish the cutover before enabling it. See once average costs are on, receive in Stockie.