Error
Error Code:
1551
MySQL Error 1551: Duplicate Event Rename Attempt
Description
This error indicates an attempt to rename a MySQL scheduled event where the specified new event name is identical to its current name. MySQL requires a unique and distinct name for the target event when using the `ALTER EVENT ... RENAME TO` statement.
Error Message
Same old and new event name
Known Causes
3 known causesIdentical Old and New Name
The `ALTER EVENT ... RENAME TO` statement was issued with the new event name being exactly the same as the event's existing name.
Unintended Name Reuse
The user might have intended to provide a new name but mistakenly typed the existing name again in the `RENAME TO` clause.
Syntax Misinterpretation
A misunderstanding of the `RENAME TO` clause led to its use even when no name change was desired, causing the old and new names to match.
Solutions
3 solutions available1. Verify and Correct Event Names easy
Ensure the old and new event names in your RENAME EVENT statement are distinct.
1
Examine the `RENAME EVENT` statement you are attempting to execute. Identify the current name of the event and the name you are trying to assign to it.
2
Compare the 'old event name' and the 'new event name'. If they are identical, this error will occur. Modify your statement to use a different name for the event.
RENAME EVENT old_event_name TO new_event_name;3
Re-execute the corrected `RENAME EVENT` statement.
2. Check for Existing Event with New Name medium
Confirm that an event with the intended new name doesn't already exist.
1
Query the `information_schema.events` table to see if an event with the proposed new name already exists in your database.
SELECT EVENT_NAME FROM information_schema.events WHERE EVENT_SCHEMA = 'your_database_name' AND EVENT_NAME = 'your_desired_new_event_name';2
If the query returns a row, it means an event with that name already exists. You will need to choose a different new event name or drop the existing event (if it's no longer needed) before renaming.
3
Once you have a unique new event name, construct and execute the `RENAME EVENT` statement.
RENAME EVENT current_event_name TO unique_new_event_name;3. Inspect Event Definitions medium
Review all event definitions to avoid accidental renaming to an existing name.
1
Generate a list of all events in your database to get a comprehensive overview.
SHOW EVENTS FROM your_database_name;2
Carefully examine the output of `SHOW EVENTS` and compare it with the intended new name for your event. This helps identify if the target name is already in use by another event.
3
If a conflict is found, decide whether to rename the existing event or choose a different name for the event you are trying to rename.
4
Execute the `RENAME EVENT` statement with a confirmed unique new name.
RENAME EVENT event_to_rename TO final_unique_name;