Two modules in a project cannot share the same content root. (Intellij Idea)

Question

I am trying to run my project (spring boot) but it is asking to configure the sdk. But it is saying Two modules in a project cannot share the same content root. I have installed jdk . Earlier it was working properly. These are are the images to get the clear idea->

I am not able to do anything. Can anyone tell me what is this "same content root' Also under the project ther are four options -> projects moduels libraries facets artifacts Please can someone explain this thing , I Checked on internet but didn't get clear idea specially for "facets" and "artifacts"? This question is alreday asked but not answered properly. Thanks in advance

Answer 1

Try to close the project and the IDE, remove all .iml files and the .idea directory via the OS task manager from your project and re-import from scratch https://www.jetbrains.com/help/idea/import-project-or-module-wizard.html#open-project