Yes. In either the Model Explorer tree view or on the graphical canvas, select the items you wish to move. Then right-click on one of the selected items. In the menu, choose “Cut” or “Copy” depending on if you want to move the items or duplicate the items. Next, right-click on the target package in the Model Explorer or on the target package’s graphical canvas and select “Paste” to complete the action (either move or duplicate).
So that means that the cut and paste does not change any GUUID in the xtuml file?
Does this also means that it is a move of a file level also? Think about this as CM issue, you dont want to have a new file item being created.