if clicked in a null-Object, no data showed

src/ui/view/GUI.java

@@ -671,6 +671,8 @@ public class GUI<E> implements CategoryListener {
 					tableModelProperties.addRow(tempCapacity);
 					tableModelProperties.setCellEditable(0, 1, false);
 					tableModelProperties.setCellEditable(2, 1, true);
+				} else if (getActualCps() == null) {
+					deleteRows();
 				}
 			}