Removing Content from Google from Old Site and Adding to New Site?

[Crusadex]

Hello everyone, friends. I used to have a personal website in the past, and now I have created a new site. If I delete the indexed content of my old site from Google using Search Console and add the content to my new site, would it still be perceived as duplicate? Also, I have removed all the indexes of my old site from Google, and before removing them, the articles were appearing as duplicate content in plagiarism checkers. After removing the indexes from Google, I checked again and now the articles are showing as unique in the plagiarism checkers. If I add these articles to my new site, would they still be considered duplicate? These articles have not been published on other sites.