Pattern preview · 12 of 4,089 sample rules shown · site-specific intelligence stays private
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checkpointer_bug
ai-agents-checkpointer-bug-when-using-langgraph-s-checkpoint-postgres-compone-c0443ecd
IFWhen using langgraph's checkpoint-postgres component version 2.0.23 (within langgraph package) with PostgresSaver checkpointer, continuing an existing thread or calling checkpointer methods on existing checkpoints raises 'NoneType' object is not a mapping error.
THENDowngrade the langgraph package to version 2.0.22 or earlier. Version 2.0.23 introduced a regression in checkpoint loading that fails when any previous thread data exists. Avoid using version 2.0.23 until a patched release is available.
Tier 170%
checkpointer_bug
ai-agents-checkpointer-bug-when-using-langgraph-checkpointer-postgres-v2-0-23-72a805ad
IFWhen 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.
THENDowngrade 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.
Tier 170%
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