PRACTICAL CSV GUIDES · UPDATED SEPTEMBER 23, 2026

Check variant dependencies before a Shopify CSV update

Updating an existing product is different from creating a new one. Some columns depend on the option data that identifies its variants. A structurally valid CSV can still describe an unintended change.

The dependency to review first.

Shopify’s documentation specifically calls out variant-related columns such as SKU and Weight value (grams): the corresponding Option1 name and Option1 value columns must be included. It warns that missing option data can create a new default variant and delete existing variants.

Incomplete update shape — do not import blindly:
URL handle,Title,SKU
linen-shirt,Linen shirt,SHIRT-BLUE

Context to preserve from the source export:
URL handle,Title,SKU,Option1 name,Option1 value
linen-shirt,Linen shirt,SHIRT-BLUE,Color,Blue

This is an illustration of the dependency, not a complete update template for every store. Use the current export from your own store to determine all variants and dependent fields.

Do not invent option values to silence an error.

Changing an option value can recreate variant IDs and affect systems that rely on them. Keep the original identifiers and options unless the change itself is intended and reviewed.

Before pressing import.

1. Export a backup and define the exact fields you intend to change.
2. Preserve handles, SKU strings and all relevant option columns from the source export.
3. Review missing columns and blank cells separately; overwrite behavior matters.
4. Compare a small sample of the edited file with the original.
5. Review Shopify’s import preview and verify the resulting sample before a broad update.

What RowReady can and cannot tell you.

The checker flags selected option dependencies. It does not load store data, detect every possible destructive update or prove that all variants are preserved. If your workflow needs before-and-after comparison, that review must be part of the agreed cleanup scope.

Have a messy supplier file? Review the demonstration delivery to see how mappings and unresolved decisions are documented.

Check your CSV → Ask about cleanup

Source: Shopify’s product CSV documentation, reviewed September 23, 2026.