diff --git a/api/apps/sdk/session.py b/api/apps/sdk/session.py
index 3874035bf..c5a7c4991 100644
--- a/api/apps/sdk/session.py
+++ b/api/apps/sdk/session.py
@@ -413,7 +413,7 @@ def list_session(chat_id,tenant_id):
                                 "document_id": chunk["doc_id"],
                                 "document_name": chunk["docnm_kwd"],
                                 "dataset_id": chunk["kb_id"],
-                                "image_id": chunk["image_id"],
+                                "image_id": chunk.get("image_id", ""),
                                 "similarity": chunk["similarity"],
                                 "vector_similarity": chunk["vector_similarity"],
                                 "term_similarity": chunk["term_similarity"],