Subgraph xx|xx not found

[deku0818]

Checked other resources

• This is a bug, not a usage question. For questions, please use GitHub Discussions.
• I added a clear and detailed title that summarizes the issue.
• I read what a minimal reproducible example is (https://stackoverflow.com/help/minimal-reproducible-example).
• I included a self-contained, minimal example that demonstrates the issue INCLUDING all the relevant imports. The code run AS IS to reproduce the issue.

Example Code

多级图的一个任务，其中包括了3级子图，计划有10个三级图，我在进行测试时前面7个都正常到了第8个就报错了,结构都差不多。

Error Message and Stack Trace (if applicable)

2024-12-08 11:04:24 | DEBUG | chat_agent.process_state_level:178 - [Main]检测到子图状态: None
2024-12-08 11:04:24 | DEBUG | chat_agent.process_state_level:183 - [Main]更新任务配置：{'configurable': {'thread_id': 'api_test1', 'checkpoint_ns': 'KBQA:50fff8b3-16c1-c5a1-691c-cd2769c3b57c|AbnormalNoiseTraction:ba80f259-831b-770b-a710-1bac29d20f3f', 'checkpoint_id': '1efb553f-327d-6438-8006-c4eed2333d6e', 'checkpoint_map': {'': '1efb553a-b6fb-616d-8001-ff17f253d729', 'KBQA:50fff8b3-16c1-c5a1-691c-cd2769c3b57c': '1efb553e-6793-685a-8007-38a447a35f3d', 'KBQA:50fff8b3-16c1-c5a1-691c-cd2769c3b57c|AbnormalNoiseTraction:ba80f259-831b-770b-a710-1bac29d20f3f': '1efb553f-327d-6438-8006-c4eed2333d6e'}}}
2024-12-08 11:04:24 | DEBUG | chat_agent.run:222 - [Main]更新任务配置：{'configurable': {'thread_id': 'api_test1', 'checkpoint_ns': 'KBQA:50fff8b3-16c1-c5a1-691c-cd2769c3b57c|AbnormalNoiseTraction:ba80f259-831b-770b-a710-1bac29d20f3f', 'checkpoint_id': '1efb553f-327d-6438-8006-c4eed2333d6e', 'checkpoint_map': {'': '1efb553a-b6fb-616d-8001-ff17f253d729', 'KBQA:50fff8b3-16c1-c5a1-691c-cd2769c3b57c': '1efb553e-6793-685a-8007-38a447a35f3d', 'KBQA:50fff8b3-16c1-c5a1-691c-cd2769c3b57c|AbnormalNoiseTraction:ba80f259-831b-770b-a710-1bac29d20f3f': '1efb553f-327d-6438-8006-c4eed2333d6e'}}}
2024-12-08 11:04:24 | WARNING | chat_agent.run:233 - [Main]处理对话时出现异常：Subgraph KBQA|AbnormalNoiseTraction not found

Description

报错三级子图的结构

System Info

langchain 0.3.8
langchain-core 0.3.21
langchain-openai 0.2.9
langchain-text-splitters 0.3.2
langgraph 0.2.53
langgraph-checkpoint 2.0.5
langgraph-sdk 0.1.36
langsmith 0.1.145

[vbarda]

Please provide a minimal reproducible example https://stackoverflow.com/help/minimal-reproducible-example