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sqlite3.OperationalError: database is locked

This error means another process is already using the same .session SQLite file.

Causes:

• You are running two instances of the same client simultaneously.

• A previous run crashed without closing the database properly.

Fix:

1. Make sure only one instance of your script is running.

2. If the error persists after a crash, delete the .session file and re-authorize, or switch to a different storage engine.