checkpointer_bugTier 1 · 70% confidence
ai-agents-checkpointer-bug-when-using-langgraph-checkpointer-postgres-v2-0-23-72a805ad
agent: ai_agents
When does this happen?
IF When using langgraph checkpointer-postgres v2.0.23, any operation on an existing thread (e.g., continue, list) raises TypeError: 'NoneType' object is not a mapping.
How others solved it
THEN Downgrade checkpointer-postgres to v2.0.22 or v2.0.21 using `pip install langgraph-checkpoint-postgres==2.0.22`. Avoid using v2.0.23 until a patched version is released. If downgrading is not possible, ensure no existing threads are accessed.
pip install langgraph-checkpoint-postgres==2.0.22
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