Sort the file so that all rows of each product are next to each other. If the later rows are a different product, give it its own handle. If the product is already in your store and you meant to update it, tick the overwrite option when importing.

Shopify import error: "Ignored line because handle already exists"

What it means: Shopify reads all rows with the same URL handle as one product, and they must sit together. When a handle turns up again after rows for another product, Shopify ignores the later lines. The full message reads "Ignored line #-## because handle `example` already exists".

Find the rows in your file

Shopify product import

Choose file

The product CSV you are about to import into Shopify, or the one Shopify just rejected.

Your file stays on this device

It is read and converted by this page, inside your browser. Nothing from the file is uploaded, and the tool keeps working offline once the page has loaded.

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The products in the sample are invented. It is checked on this device, the same way your own file would be.

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How to fix it

Sort the file so that all rows of each product are next to each other.
If the later rows are a different product, give it its own handle.
If the product is already in your store and you meant to update it, tick the overwrite option when importing.

Example

A file with this problem

Title,URL handle,Status,Option1 name,Option1 value,Price,Inventory tracker,Inventory quantity,Continue selling when out of stock,Fulfillm...
Cotton Tee,cotton-tee,active,Size,S,20.00,shopify,5,deny,manual,
Mug,mug,active,Title,Default Title,12.00,shopify,5,deny,manual,
,cotton-tee,,,M,20.00,shopify,5,deny,manual,

What the checker says about it

Line 4 uses the handle "cotton-tee" again after rows for another product. Keep all rows of a product together, and give each product its own handle; otherwise Shopify reports "Ignored line ... because handle cotton-tee already exists".

Once the listed rows are fixed, check the file again; the checker also looks for every other problem Shopify documents, so you do not trade one error for the next.

Questions

What does "Ignored line because handle already exists" mean in Shopify?: Shopify reads all rows with the same URL handle as one product, and they must sit together. When a handle turns up again after rows for another product, Shopify ignores the later lines. The full message reads "Ignored line #-## because handle `example` already exists".
How do I fix it?: Sort the file so that all rows of each product are next to each other. If the later rows are a different product, give it its own handle. If the product is already in your store and you meant to update it, tick the overwrite option when importing.

Other Shopify import errors

Sources

Shopify Help Center: Solutions to common product CSV import problems: https://help.shopify.com/en/manual/products/import-export/common-import-issues

Based on Shopify's help pages for product CSV import. Not tested on a live store.