diff --git a/api/chat_routes.py b/api/chat_routes.py
index bd3a81f..9d076f4 100644
--- a/api/chat_routes.py
+++ b/api/chat_routes.py
@@ -1650,7 +1650,8 @@ def select_images(contexts: List[Dict], query: str) -> List[Dict]:
                     existing_ids = {img['id'] for img in scored_images}
                     if img_id and img_id not in existing_ids:
                         # 为关联图片计算分数（继承主表格分数，略低）
-                        assoc_score = s - 1.0 if s >= MIN_SCORE else MIN_SCORE - 1.0
+                        ctx_score = ctx.get("score", 0)
+                        assoc_score = ctx_score - 1.0 if ctx_score >= MIN_SCORE else MIN_SCORE - 1.0
                         if assoc_score >= MIN_SCORE:
                             scored_images.append({
                                 'score': assoc_score,