diff --git a/app/service/design/items/pipelines/painting.py b/app/service/design/items/pipelines/painting.py
index 5936ccc..938bd5b 100644
--- a/app/service/design/items/pipelines/painting.py
+++ b/app/service/design/items/pipelines/painting.py
@@ -91,7 +91,8 @@ class PrintPainting(object):
         single_print = result['print']['single']
         overall_print = result['print']['overall']
         element_print = result['print']['element']
-
+        result['single_image'] = None
+        result['print_image'] = None
         if overall_print['print_path_list']:
             painting_dict = {'dim_image_h': result['pattern_image'].shape[0], 'dim_image_w': result['pattern_image'].shape[1]}
             result['print_image'] = result['pattern_image']
@@ -106,7 +107,7 @@ class PrintPainting(object):
             else:
                 painting_dict = self.painting_collection(painting_dict, overall_print, print_trigger=True, is_single=False)
             result['print_image'] = self.printpaint(result, painting_dict, print_=True)
-        result['single_image'] = result['pattern_image'] = result['print_image']
+            result['single_image'] = result['pattern_image'] = result['print_image']
 
         if single_print['print_path_list']:
             print_background = np.zeros((result['pattern_image'].shape[0], result['pattern_image'].shape[1], 3), dtype=np.uint8)