MySQL 1181: Duplicate transaction.

What is MySQL 1181: Duplicate transaction.

Identify the cause of the duplicate transaction by checking the application logs or MySQL logs to see if multiple requests are being sent unintentionally. Use the MySQL query:

SHOW ENGINE INNODB STATUS; Look for the `LATEST DETECTED DEADLOCK` section to identify transactions that were involved in the error.

Check for duplicate entries in the table that might be causing the error. Depending on your table structure, you might run a query like:

SELECT column_name, COUNT(*) FROM table_name GROUP BY column_name HAVING COUNT(*) > 1; Replace `columnname` and `tablename` with the actual column and table names involved in the transaction.

If the duplicate transaction involves a unique constraint or primary key, verify the data that is being inserted. Make sure that the data being inserted or updated does not violate any unique constraints.

Temporarily increase the verbosity of the MySQL error log to capture more detailed information about the error. Use the following command to adjust the logging level:

SET GLOBAL logerrorverbosity = 3; After investigating, remember to set it back to its original level to avoid excessive logging.

If possible, manually retry the transaction with a delay to see if it was a transient issue. This can be done directly via your application logic or manually through a MySQL client if you were directly executing the transaction.

6. If the duplicate error is related to a specific application function, review the code path for that functionality to ensure it does not inadvertently attempt the same transaction multiple times under certain conditions.