You can easily add a new child variant to the already existing parent by using the StoreAutomator UI or with bulk import.
Via SA UI:
1- Select the related parent product and click the “Edit” icon under the Actions.
2- Find and click the “Add Variant” under the Variations tab.
3- You can either add an already existing single item to the selected parent or you can create a brand new child product to attach under the parent.
Creating a New Variant
- Select the “Create a New Variant”
- Provide a product id.
- Provide unique SKU or click to generate “Auto Sku”.
- Provide a Price and Quantity for the product.
- Provide unique Variation Options for the product.
- Click the “Add”
Converting A Single Product to a Variant
- Select the “Convert a Single Product to a Variant”.
- Search and find the SKU of the single product.
- Provide unique Variation Options for the product.
- Click the “Add”.
After these steps related SKU will be added to the parent product.
Via Bulk Export/Import:
1- Select the product that you want to merge with the related parent and go to “Export>Custom…”
2- Select the fields “Parentage, Parent SKU, Variation Options and Variation Types” from the custom fields export selector and click the export.
3- Download the file from the “Notifications” from the top right of the screen.
4- Open the exported file and:
- Change the value “Single” to “Child” in the “parentage” column.
- Provide the parent sku that you want to add this product as a variant in the “parent_sku” column.
- Provide unique variation options for the product in the “variation_options” column.
- Provide the correct variation types of the related parent and enter to the variation_types” column for this product.
5- Upload the file back into the SA from the top right.