Welcome to the Q&A Forum

This might be a dumb question but we had an incident where a new SEO guy thought it would be a good idea to un-publish and republish all of your 200+ blog posts which we carefully scheduled over the last 6 months. He did not update the content and did not change anything. His intention was to send out google a sign to recheck the sites or something. Now, the entire blog looks like it wen't live in one day, which I don't think is good? Should we load a backup and get our old publishing dates back, should we keep it with the new publishing dates? What are the consequences? Will it effect our SEO?