How to restore USCIMPSYS databases?

Go to any of your production databases.
In the Admin module, proceed to Others>Auto DB Creation> Support database.
From the Support databases screen, select USCIMPSYS from the list available in the Database field.
Now you must click on the detach button. This will remove the previous file.
In Install From Location field, click on browse to select the defined location where the files are kept (named USCIMPSYS).
Finally, click add to attach the new files.