Multiple Primary keys error

In case you have a simple table with multiple Primary Keys eg:

CREATE TABLE `item_subitem` (
`itemid` int(5) unsigned NOT NULL default '0',
`subitemid` int(5) unsigned NOT NULL default '0',
PRIMARY KEY (`itemid`,`subitemid`)
) TYPE=MyISAM


The script will generate the following:

create table item_subitem
(
itemid int unsigned primary key,
subitemid int unsigned primary key
);

And this will throw an error while trying to execute:

ERROR 1068 (42000) at line 256: Multiple primary key defined

Is there any maintenance of this script?

Only one primary key may be defined for the same table.
So, it's not a bug.

Im afraid not. You may have a goup of fields, assigned as a primary key, in the same table.
They would be foreign keys, also

By the way.. if you run this:
CREATE TABLE `item_subitem` (
`itemid` int(5) unsigned NOT NULL default '0',
`subitemid` int(5) unsigned NOT NULL default '0',
PRIMARY KEY (`itemid`,`subitemid`)
) TYPE=MyISAM

you will fin that it's a perfectly valid statement.

Actually, the example above, is a table definition in an existing database. And the code below, was generated by this script.

Well, it's still only one primary key.. However, I apologize as I misunderstood the question. Probably, a case where multiple coloumns will be added to the primary key, is forgotten.
Let me -and the author of course!- check the code against it.