Can another inventory app conflict with SKU Stock Sync?

Yes. Another app, warehouse system, feed, automation, or custom integration can conflict with SKU Stock Sync if it updates the same inventory quantities.

This can happen when both systems try to control the same stock level. SKU Stock Sync may align a SKU/location group, then another system may change one of those quantities again.

Note: Groups stocked at locations managed by an app that handles fulfillment (for example, Shopify Collective) are automatically skipped during sync, specifically to avoid this kind of conflict. You shouldn't need to do anything manually for fulfillment-managed locations. This mainly matters for other integrations like warehouse systems, feeds, or custom scripts.

Warning: Two apps can both be working correctly on their own, but still create confusing results if they are both trying to control the same inventory.

If inventory keeps changing unexpectedly, check Shopify adjustment history to see what changed the inventory and when. See Another app is changing inventory.