Variant Does Not Exist Error
If you delete a product or variant in Shopify that customers are still subscribed to, it will cause the error Variant removed from Shopify.
In the ReCharge Dashboard go to Orders > Errors tab.
Find the customers with the error.
Click Fix Issue to the right of the error pictured above.
Select the new variant to point them to. This will impact all customers currently subscribed to the product.