JDK/JRE and older Java versions

Hello, as a Java developer, I sometimes need to do compatibility checking using older versions, often using JRE, while I need a JDK for development. When I tried to update arch linux now, I found I cannot start any update because the update is blocked by setting JRE and JDK as conflicting packages. I tried to only install JDK 21, but the update is still being blocked because of my older versions of the JRE. Why do You block any software installation? I don't like the idea to enforce me to use any specific software, or to remove any specific one. Is there any possibility to remove the lock-in? Kind regards, Peter