After update openfire server,can't login in as admin in console

The version of my old OF is 3.10.2.To ensure security, I upgraded it to the latest 4.7.5 version. During installation, I opted for the option that update the installed version. However, after installation, I was unable to log in as an admin; the page shows that the username or password was incorrect.
Did something go wrong during the update process?Was the structure of the corresponding openfire database table modified?What do I need to adjust?