Working with SketchUp Models in LayOut. If the SketchUp file changes, you can update references to the SketchUp file in your document with a few easy clicks.

It would be easier to give you a definitive answer if the LO file was available but we'll try without it and do the best we can. The typical reason is that the viewport has been modified from the original SketchUp scene. This happens with you open the viewport and orbit or zoom the view of the model. You can tell the viewport has been modified by the addition of [Modified] in the scene name displayed in the SketchUp inspector when the viewport is selected. Codename Panzers Phase Ii Italy Sat there.

Select the unmodified version of the scene from the list and it should update. Best practice is to avoid creating modified scenes in LO. Another possibility is that your SU file is not linked to the LO file any longer. You can determine that under File>Document SetUp.