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Currently themes are applied to the default store. Manual selection is needed for association with a different storefront.
BigCommerce Product API issues when recreating products with high variant count
In some instances when recreating products with high variant count (e.g. a product with more than 600 variants), BigCommerce returns an Internal Server 500 error. Adjusting the product variant count and listing it shows success. Another related error type is with product URL's redirecting to 404 Webpage not found.
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