fix: document delete image files check file exist

api/core/indexing_runner.py

@@ -317,15 +317,15 @@ class IndexingRunner:
                 image_upload_file_ids = get_image_upload_file_ids(document.page_content)
                 for upload_file_id in image_upload_file_ids:
                     image_file = db.session.query(UploadFile).filter(UploadFile.id == upload_file_id).first()
+                    if image_file is None:
+                        continue
                     try:
-                        if image_file:
                         storage.delete(image_file.key)
                     except Exception:
                         logging.exception(
                             "Delete image_files failed while indexing_estimate, \
                                           image_upload_file_is: {}".format(upload_file_id)
                         )
-                    if image_file:
                     db.session.delete(image_file)
 
         if doc_form and doc_form == "qa_model":