diff --git a/backend/server.py b/backend/server.py
index bd6471a..4849aac 100644
--- a/backend/server.py
+++ b/backend/server.py
@@ -2629,7 +2629,7 @@ def handle_update_assigned_agents(data):
                 existing_assigned[step_id]["agent_combinations"] = existing_combinations
 
             # 更新 agent_combinations（保存 TaskProcess 数据）
-            elif agent_combinations:
+            if agent_combinations:
                 # 合并新旧数据
                 existing_combinations = existing_assigned[step_id].get("agent_combinations", {})
                 for key, value in agent_combinations.items():