How to override a new product with existing product details?

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I ran into a problem where I was using Printify and disconnected my store from it to troubleshoot something. It unpublished all the products from my store and now I have to manually add it in again. However, I do have the existing products that were published before I disconnected the store. How do I transfer the product descriptions, prices, images, SEO...from the existing/unsynced products to the published/synced products?