If a project has been removed, an automatic mapping is not possible. You can recognize this at the respective icon in the directory tree. In the left table of the old project, at each line, the icon is displayed. The right table of the new project is missing.

If the project is really missing, confirm the missing assignment.

Confirm missing assignment

Click on the button Verify all mappings .

All assignments confirmed: The respective icons are displayed in the directory tree and in the table.

In a similar case it could be that you wanted to assign a project manually. A description on manual assignment can be found under Section 9.9.2, “User interface and a simple use case”.