This is what I was talking about. I know it's not the focus of the story, so it doesn't really matter. But objectively speaking, he had a child for 10 years, who incidentally turned out not to be his biological child, but why should that matter? Are adopted children not to as valuable as biological ones? Is it the child's fault their biological parents are scumbags? The MC is supposed to be a good guy, so he had a child he raised and loved for 10 years. By turning back time, he deleted that child out of existence without thinking twice about it. Even if the minister of finance and the princess have sex again and make a child again, rationally speaking it won't be the same child. And even if it is, his relationship with that child, which he raised and loved for 10 years, is deleted. But nah, the bad guy is the biological father of the child, that means the child is worthless, so who cares? That's fucked up, bro.