fix: document delete image files check file exist (#21991)

api/core/indexing_runner.py

@@ -317,8 +317,9 @@ 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(