I attempted to upgrade to version 6.6 today. I started with my custom app component, ‘mycomp’. That went smoothly. I then attempted to upgrade another project that uses ‘mycomp’. I then received the following error:
Component 'com.mycomp' can not be added. App component must have different component id (root package) from current project and other app components.
I then removed the reference to ‘mycomp’, upgraded, then attempted to reference ‘mycomp’ again and received the same error.