Postgres/Simple Chat Memory issue after upgrading to n8n v1.88

Hi everyone,

I recently updated my n8n cloud instance from version 1.83 to version 1.88 and encountered a significant issue with my workflow, specifically with the Postgres Chat Memory node integrated with an AI Tools Agent.

Issue Summary:

  • Before upgrading, the AI Tools Agent successfully remembered conversational context across interactions using Postgres Chat Memory.
  • Post-upgrade (v1.88), the AI Agent now continuously repeats the initial system prompt, ignoring previous interactions and stored chat history, although I confirmed that session data and history are correctly saved in PostgreSQL.

Troubleshooting Steps Taken:

  • Confirmed correct configuration (consistent Session ID per user).
  • Verified PostgreSQL entries are correctly created and readable.
  • Checked execution logs; the AI Agent retrieves the correct context from Postgres but seems not to utilize it properly.

Has anyone else experienced similar issues after upgrading? If so, have you found any fixes or workarounds?

Any advice or assistance would be greatly appreciated.

Thank you!

Hi,

Your title states simple memory / postgresql

Can you confirm that with both of them you experience the same problem?

reg,
j.