A common error you can run into while working with Listing Mirror and Shopify is:
What this error means is that the Shopify listing has been edited in the Shopify marketplace directly. Doing so can cause a disconnect between the listing in Shopify and the listing in Listing Mirror and we won't be syncing qty or any changes made.
All listings (except for qualifying Amazon listings) should be edited directly in Listing Mirror. Once you've edited them and saved your changes, the changes will be synced out to the marketplace.
If you do edit a listing directly in your marketplace, the solution is for support to delete the listing from Listing Mirror and reimport to restore that connection and continue to sync your listing data.
*Please do not attempt to delete the listing yourself, you risk deleting the listing from the marketplace as well.*
If you find yourself with this error, please reach out to support and we can assist you.