Some variants are missing from a sync
If a sync ran but some variants were not included, the missing variants were likely not part of the same SKU/location group at the time of the sync.
SKU Stock Sync groups variants by SKU and Shopify location. A variant needs to match both before it can be included in the same sync group.
For more details, see What are SKU/location groups?.
Start by opening the sync run
The quickest way to check why a variant was missing is to open the sync run in History and review the group members.
In SKU Stock Sync, open the History page.
Use the date, SKU, and location filters to find the run where the variant should have been included.
For more details, see Sync history.
Open the SKU/location group from the run and review the listed members.
If the variant is not listed as a member, SKU Stock Sync did not treat it as part of that group during the sync.
Common reasons variants are missing
The SKU does not match exactly. Even a small difference such as an extra space, dash, or letter case change can stop variants from being grouped together. See how to verify.
The variant is stocked at a different location. The same SKU at another Shopify location is treated as a separate group. See What are SKU/location groups?
The variant was added recently. New products or variants may need to be detected and prepared before they can be included in syncing. See Creating / updating groups.
The SKU was changed recently. SKU changes can move a variant into or out of a group, but the app may need time to prepare the updated grouping. See Creating / updating groups.
The inventory location changed recently. Adding or removing a variant from a Shopify location can affect whether it belongs to a group at that location. See Creating / updating groups.
The variant only matched after the sync ran. History shows what was processed at the time of the sync, not what matches later.
Check the SKU first
If a variant is missing from a sync, first confirm that it shares the exact same SKU as the variants that were included.
In Shopify, open the product variant that was missing from the sync.
Confirm that the SKU value exactly matches the SKU used by the variants that were synced.
If Shopify shows that the SKU is in use by other items, use View in bulk editor to review the matching variants.
For a detailed walkthrough, see Check shared SKUs in Shopify.
SKUs must match exactly. ABC-123, ABC123, and ABC-123 will be treated as different SKUs.
Check the location
If the SKU matches, check whether the missing variant is stocked at the same Shopify location as the synced variants.
If the variant is not stocked at the location at all, it cannot be included in the group for that location.
If the variant was recently added to the location, SKU Stock Sync may need to detect and prepare it before it appears in syncs.
If the variant was recently added or changed
New products, new variants, SKU changes, and location changes may need to be prepared before they are included in syncing.
Open the Manual section on the Sync page and check whether any items are waiting for setup.
For more details, see Creating / updating groups.
If the missing variant should have been included
If the SKU and location both match, but the variant still does not appear in the sync group, check these items next:
Confirm the app is not paused on the Sync status page.
Run a small test inventory change on a low-risk variant in the same group. See here for Testing the app.
For broader troubleshooting, see Inventory did not sync.
Important things to know
A sync run only shows the variants that were part of the group at the time that sync ran.
The same SKU at different locations creates separate groups.
When to contact support
If the variant still looks like it should have been included, reach out me and include:
The SKU
The Shopify location
The variant that was included in the sync
The variant that was missing from the sync
A screenshot of the SKU field for the missing variant
Whether the product, variant, SKU, or location was recently changed