fix: send message error when chatting with opening statement (#8627)

web/app/components/app/configuration/debug/debug-with-single-model/index.tsx

@@ -83,11 +83,17 @@ const DebugWithSingleModel = forwardRef<DebugWithSingleModelRefType, DebugWithSi
       },
     }
 
+    const lastAnswer = chatListRef.current.at(-1)
+
     const data: any = {
       query: message,
       inputs,
       model_config: configData,
-      parent_message_id: last_answer?.id || chatListRef.current.at(-1)?.id || null,
+      parent_message_id: last_answer?.id || (lastAnswer
+        ? lastAnswer.isOpeningStatement
+          ? null
+          : lastAnswer.id
+        : null),
     }
 
     if (visionConfig.enabled && files?.length && supportVision)