Adding currency info for WooCommerce orders

In order to improve customer service and marketing, I just purchased the WooCommerce Multi Currency plugin for a site that was already running and has previous acquisitions.

Installation, activation and configuration went smoothly, thus far

However, the site pointed to an original coin; but with the plugin we decided that the default currency would be US dollars, leaving the original currency as another option, and now a message appears stating “Some orders are missing currency info, which leads to incorrect revenue and orders statistics in analytics / report. Do you want to fix it by adding currency info for those orders using the current exchange rates? ”

They would be so kind to explain to me the changes that are going to be made and what effect it will have on the previous acquisitions given the currency change, or guide me to a document where it is explained (I already looked for it and I could not find it)

Thanks and regards