Update PPOCRLabel.py

PPOCRLabel/PPOCRLabel.py

@@ -2716,9 +2716,8 @@ class MainWindow(QMainWindow):
             self._update_shape_color(shape)
             self.keyDialog.addLabelHistory(key_text)
             
-            # save changed shape
-            self.singleLabel(shape)
-            self.setDirty()
+        # save changed shape
+        self.setDirty()
 
     def undoShapeEdit(self):
         self.canvas.restoreShape()