#1025 - Error on rename of './database/#sql-2e0f_1254ba7' to './database/table' (errno: 150)

mysql sql phpmyadmin innodb mysql-error-1025
Richard Knop picture Richard Knop · Nov 2, 2010 · Viewed 101.4k times · Source

So I am trying to add a primary key to one of the tables in my database. Right now it has a primary key like this:

PRIMARY KEY (user_id, round_number)

Where user_id is a foreign key.

I am trying to change it to this:

PRIMARY KEY (user_id, round_number, created_at)

I am doing this in phpmyadmin by clicking on the primary key icon in the table structure view.

This is the error I get:

#1025 - Error on rename of './database/#sql-2e0f_1254ba7' to './database/table' (errno: 150)

It is a MySQL database with InnoDB table engine.

Answer

Ike Walker picture Ike Walker · Nov 2, 2010

There is probably another table with a foreign key referencing the primary key you are trying to change.

To find out which table caused the error you can run SHOW ENGINE INNODB STATUS and then look at the LATEST FOREIGN KEY ERROR section.

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