I bought this lecture to listen to the latest lecture and build a foundation. It's painful ㅠ Is it because a lot of time has passed since the lecture? + There's a bug + The explanation of the h2 database setting is poor (something is different, so I deleted the settings and reinstalled them, but the settings were not restored => Invested 1~2 hours to try to restore => In the end, I connected to the familiar mysql + I don't want to use XML, but I use XML + Use Maven javax.persistence => jakarta.persistence This part is also confusing (It seems that Oracle changed the name) It's painful. It's too hard to listen to the lecture while fixing bugs ㅠ I'll listen to the end thinking that I'm building a foundation.. I think the lecture needs to be updated ----------------------------------- You don't have to follow each example one by one, but if you listen for the purpose of understanding, you can follow along comfortably! You type too fast, so I can't follow along I understand it well!