How to Fix Outdated WooCommerce Templates?
WooCommerce display this message in the admin panel, when any WooCommerce template is copied (and modified) in the theme, and, any modified template is updated in the recent WooCommerce updates, and the theme still contains the old template(s).
This message may or may not indicate the templates need updating (they could be working just fine). But, it does not mean the theme is broken or needs an update. So, you may safely dismiss the message or update the theme to latest version.
If updating the theme to the latest version, doesn’t resolve this issue, wait for next release with the updated templates.
For more details refer below link. https://envatohosted.zendesk.com/hc/en-us/articles/115004313834-Your-Theme-has-WooCommerce-Templates-that-are-out-of-date-message-in-Admin