Maven install, you can find the dependencies, but you can find the JARs of the other models installed, not the source code of the project. Model version number is controlled by Properties in Profile instead of the outermost Properties, resulting in IDEA not being able to identify the local version of the model, so that it can look for dependencies in the repository. Analysis: The source code for other models will only be found if the version number of the dependent model is defined as a constant, or if the variable is defined in properties (not profile)